This image made from video shows police on street corner after a shooting in Melbourne, Australia, Friday, Nov. 9, 2018. Police shot a knife-wielding man Friday after he fatally stabbed one person and injured two others in the center of Australia's second-largest city, police said. (Australian Broadcasting Corporation via AP)

This image made from video shows police cordon in Melbourne, Australia, Friday, Nov. 9, 2018. Police shot a knife-wielding man Friday after he fatally stabbed one person and injured two others in the center of Australia's second-largest city, police said. (Australian Broadcasting Corporation via AP)

This image made from video shows white sheet covering object on street in Melbourne, Australia, Friday, Nov. 9, 2018. Police shot a knife-wielding man Friday after he fatally stabbed one person and injured two others in the center of Australia's second-largest city, police said. (Australian Broadcasting Corporation via AP)

A body is seen under a white sheet at the scene following a stabbing incident in Melbourne on November 9, 2018. - Multiple people were hurt in a rush hour stabbing incident in Melbourne's central business district, police said on November 9, after they apprehended a suspect near a burning vehicle. (Photo by WILLIAM WEST / AFP)

A police officer directs people away from the crime scene as a body is seen covered with a white sheet in Melbourne on November 9, 2018. - Multiple people were hurt in a rush hour stabbing incident in Melbourne's central business district, police said on November 9, after they apprehended a suspect near a burning vehicle. (Photo by WILLIAM WEST / AFP)

A body is seen under a white sheet at the scene following a stabbing incident in Melbourne on November 9, 2018. - Multiple people were hurt in a rush hour stabbing incident in Melbourne's central business district, police said on November 9, after they apprehended a suspect near a burning vehicle. (Photo by WILLIAM WEST / AFP)

A police officer directs people away from the crime scene as a body is seen covered with a white sheet following a stabbing incident in Melbourne on November 9, 2018. - One person was killed and multiple people hurt in a rush hour stabbing incident in Melbourne's central business district, police said on November 9, after they apprehended a suspect near a burning vehicle. (Photo by WILLIAM WEST / AFP)

Police work at the crime scene following a stabbing incident in Melbourne on November 9, 2018. - One person was killed and multiple people hurt in a rush hour stabbing incident in Melbourne's central business district, police said on November 9, after they apprehended a suspect near a burning vehicle. (Photo by WILLIAM WEST / AFP)

Police work at the crime scene following a stabbing incident in Melbourne on November 9, 2018. - One person was killed and two others injured in a rush hour stabbing incident in Melbourne's bustling central business district on November 9, prompting police to shoot a knife-wielding suspect near a burning vehicle. (Photo by WILLIAM WEST / AFP)

Police work at the crime scene following a stabbing incident in Melbourne on November 9, 2018. - One person was killed and two others injured in a rush hour stabbing incident in Melbourne's bustling central business district on November 9, prompting police to shoot a knife-wielding suspect near a burning vehicle. (Photo by WILLIAM WEST / AFP)

Police work at the crime scene following a stabbing incident in Melbourne on November 9, 2018. - One person was killed and two others injured in a rush hour stabbing incident in Melbourne's bustling central business district on November 9, prompting police to shoot a knife-wielding suspect near a burning vehicle. (Photo by WILLIAM WEST / AFP)

A burnt vehicle (R) is pictured at the crime scene following a stabbing incident in Melbourne on November 9, 2018. - One person was killed and two others injured in a rush hour stabbing incident in Melbourne's bustling central business district on November 9, prompting police to shoot a knife-wielding suspect near a burning vehicle. (Photo by WILLIAM WEST / AFP)

A burnt vehicle (background C) is pictured at the crime scene following a stabbing incident in Melbourne on November 9, 2018. - One person was killed and two others injured in a rush hour stabbing incident in Melbourne's bustling central business district on November 9, prompting police to shoot a knife-wielding suspect near a burning vehicle. (Photo by WILLIAM WEST / AFP)

A police officer inspects a body at the crime scene following a stabbing incident in Melbourne on November 9, 2018. - One person was killed and two others injured in a rush hour stabbing incident in Melbourne's bustling central business district on November 9, prompting police to shoot a knife-wielding suspect near a burning vehicle. (Photo by WILLIAM WEST / AFP)

A police officer inspects a body at the crime scene following a stabbing incident in Melbourne on November 9, 2018. - One person was killed and two others injured in a rush hour stabbing incident in Melbourne's bustling central business district on November 9, prompting police to shoot a knife-wielding suspect near a burning vehicle. (Photo by WILLIAM WEST / AFP)

A police officer inspects a body at the crime scene following a stabbing incident in Melbourne on November 9, 2018. - One person was killed and two others injured in a rush hour stabbing incident in Melbourne's bustling central business district on November 9, prompting police to shoot a knife-wielding suspect near a burning vehicle. (Photo by WILLIAM WEST / AFP)

EDITORS NOTE: Graphic content / A police officer inspects a body at the crime scene following a stabbing incident in Melbourne on November 9, 2018. - One person was killed and two others injured in a rush hour stabbing incident in Melbourne's bustling central business district on November 9, prompting police to shoot a knife-wielding suspect near a burning vehicle. (Photo by WILLIAM WEST / AFP)

A police officer inspects a body at the crime scene following a stabbing incident in Melbourne on November 9, 2018. - One person was killed and two others injured in a rush hour stabbing incident in Melbourne's bustling central business district on November 9, prompting police to shoot a knife-wielding suspect near a burning vehicle. (Photo by WILLIAM WEST / AFP)

EDITORS NOTE: Graphic content / A police officer inspects a body at the crime scene following a stabbing incident in Melbourne on November 9, 2018. - One person was killed and two others injured in a rush hour stabbing incident in Melbourne's bustling central business district on November 9, prompting police to shoot a knife-wielding suspect near a burning vehicle. (Photo by WILLIAM WEST / AFP)

State Emergency Service (SES) personnel erect a tent as a body lies at the crime scene following a stabbing incident in Melbourne on November 9, 2018. - One person was killed and two others injured in a rush hour stabbing incident in Melbourne's bustling central business district on November 9, prompting police to shoot a knife-wielding suspect near a burning vehicle. (Photo by WILLIAM WEST / AFP)

State Emergency Service (SES) personnel work at the crime scene as a body lies on the ground following a stabbing incident in Melbourne on November 9, 2018. - One person was killed and two others injured in a rush hour stabbing incident in Melbourne's bustling central business district on November 9, prompting police to shoot a knife-wielding suspect near a burning vehicle. (Photo by WILLIAM WEST / AFP)

A body (background) lies on a road as a police officer keeps watch at the crime scene following a stabbing incident in Melbourne on November 9, 2018. - A knife-wielding attacker killed one person and injured two others in a rush hour stabbing rampage in downtown Melbourne on November 9, before being shot and captured by police. (Photo by WILLIAM WEST / AFP)

A burnt vehicle is pictured at the crime scene following a stabbing incident in Melbourne on November 9, 2018. - A knife-wielding attacker killed one person and injured two others in a rush hour stabbing rampage in downtown Melbourne on November 9, before being shot and captured by police. (Photo by WILLIAM WEST / AFP)

State Emergency Service (SES) personnel erect a tent as a body lies at the crime scene following a stabbing incident in Melbourne on November 9, 2018. - A knife-wielding attacker killed one person and injured two others in a rush hour stabbing rampage in downtown Melbourne on November 9, before being shot and captured by police. (Photo by WILLIAM WEST / AFP)

A police officer inspects a body at the crime scene following a stabbing incident in Melbourne on November 9, 2018. - A knife-wielding attacker killed one person and injured two others in a rush hour stabbing rampage in downtown Melbourne on November 9, before being shot and captured by police. (Photo by WILLIAM WEST / AFP)

Police investigate the crime scene following a stabbing incident in Melbourne on November 9, 2018. - A knife-wielding attacker killed one person and injured two others in a rush hour stabbing rampage in downtown Melbourne on November 9, before being shot and captured by police. (Photo by WILLIAM WEST / AFP)

A police officer (C) inspects a body at the crime scene following a stabbing incident in Melbourne on November 9, 2018. - A knife-wielding attacker killed one person and injured two others in a rush hour stabbing rampage in downtown Melbourne on November 9, before being shot and captured by police. (Photo by WILLIAM WEST / AFP)

A burnt out vehicle is pictured at the crime scene following a stabbing incident in Melbourne on November 9, 2018. - One person was killed and two others injured in a rush hour stabbing incident in Melbourne's bustling central business district on November 9, prompting police to shoot a knife-wielding suspect near a burning vehicle. (Photo by William WEST / AFP)

(181109) -- MELBOURNE, Nov. 9, 2018 -- Policemen guard at the site where a man attacked others in Melbourne, Australia, on Nov. 9, 2018. One person died from stab wounds and at least two others were treated for injuries in an attack in downtown of Australia s Victoria state capital Melbourne late Friday afternoon, according to police. Bai Xue) (psw) AUSTRALIA-MELBOURNE-ATTACK GuixQing PUBLICATIONxNOTxINxCHN

(181109) -- MELBOURNE, Nov. 9, 2018 -- Policemen guard at the site where a man attacked others in Melbourne, Australia, on Nov. 9, 2018. One person died from stab wounds and at least two others were treated for injuries in an attack in downtown of Australia s Victoria state capital Melbourne late Friday afternoon, according to police. ) (psw) AUSTRALIA-MELBOURNE-ATTACK GuixQing PUBLICATIONxNOTxINxCHN

MELBOURNE, AUSTRALIA - NOVEMBER 9: Police take security measurement after a man has been shot by police after setting his car on fire and stabbing several people in Melbourne, Australia on November 9, 2018. At least one person is killed, three others injured in the attack. Recep Sakar / Anadolu Agency/ABACAPRESS.COM

MELBOURNE, AUSTRALIA - NOVEMBER 9: Police take security measurement after a man has been shot by police after setting his car on fire and stabbing several people in Melbourne, Australia on November 9, 2018. At least one person is killed, three others injured in the attack. Recep Sakar / Anadolu Agency/ABACAPRESS.COM

MELBOURNE, AUSTRALIA - NOVEMBER 9: Police take security measurement after a man has been shot by police after setting his car on fire and stabbing several people in Melbourne, Australia on November 9, 2018. At least one person is killed, three others injured in the attack. Recep Sakar / Anadolu Agency/ABACAPRESS.COM

(181109) -- MELBOURNE, Nov. 9, 2018 -- Policemen guard at the site where a man attacked others in Melbourne, Australia, on Nov. 9, 2018. One person died from stab wounds and at least two others were treated for injuries in an attack in downtown of Australia s Victoria state capital Melbourne late Friday afternoon, according to police. ) (psw) AUSTRALIA-MELBOURNE-ATTACK BaixXue PUBLICATIONxNOTxINxCHN

(181109) -- MELBOURNE, Nov. 9, 2018 -- A policeman guards at the site where a man attacked others in Melbourne, Australia, on Nov. 9, 2018. One person died from stab wounds and at least two others were treated for injuries in an attack in downtown of Australia s Victoria state capital Melbourne late Friday afternoon, according to police. ) (psw) AUSTRALIA-MELBOURNE-ATTACK GuixQing PUBLICATIONxNOTxINxCHN

(181109) -- MELBOURNE, Nov. 9, 2018 -- Policemen guard at the site where a man attacked others in Melbourne, Australia, on Nov. 9, 2018. One person died from stab wounds and at least two others were treated for injuries in an attack in downtown of Australia s Victoria state capital Melbourne late Friday afternoon, according to police. ) (psw) AUSTRALIA-MELBOURNE-ATTACK BaixXue PUBLICATIONxNOTxINxCHN

(181109) -- MELBOURNE, Nov. 9, 2018 -- Policemen guard at the site where a man attacked others in Melbourne, Australia, on Nov. 9, 2018. One person died from stab wounds and at least two others were treated for injuries in an attack in downtown of Australia s Victoria state capital Melbourne late Friday afternoon, according to police. ) (psw) AUSTRALIA-MELBOURNE-ATTACK BaixXue PUBLICATIONxNOTxINxCHN

(181109) -- MELBOURNE, Nov. 9, 2018 -- Policemen guard at the site where a man attacked others in Melbourne, Australia, on Nov. 9, 2018. One person died from stab wounds and at least two others were treated for injuries in an attack in downtown of Australia s Victoria state capital Melbourne late Friday afternoon, according to police. ) (psw) AUSTRALIA-MELBOURNE-ATTACK BaixXue PUBLICATIONxNOTxINxCHN

MELBOURNE, AUSTRALIA - NOVEMBER 9: Police take security measurement after a man has been shot by police after setting his car on fire and stabbing several people in Melbourne, Australia on November 9, 2018. At least one person is killed, three others injured in the attack. Recep Sakar / Anadolu Agency/ABACAPRESS.COM