A firefighter walks in the debris caused by an explosion at the Polyplas plant in the Villas Agricolas neighborhood in Santo Domingo, Dominican Republic, Wednesday, Dec. 15, 2018. The mayor told reporters the fire began when a boiler exploded early Wednesday afternoon at the plastics company. Authorities say at least two people have died. (AP Photo/Tatiana Fernandez)

Search and rescue stand in the debris caused by an explosion at the Polyplas plant in the Villas Agricolas neighborhood in Santo Domingo, Dominican Republic, Wednesday, Dec. 5, 2018. The mayor told reporters the fire began when a boiler exploded early Wednesday afternoon at the plastics company. Authorities say at least two people have died. (AP Photo/Tatiana Fernandez)

A car is covered in debris next to a collapsed building, both damaged in an explosion at the Polyplas plant in the Villas Agricolas neighborhood in Santo Domingo, Dominican Republic, Wednesday, Dec. 5, 2018. The mayor told reporters the fire began when a boiler exploded early Wednesday afternoon at the plastics company. Authorities say at least two people have died. (AP Photo/Tatiana Fernandez)

A black plume of smoke rises after an explosion at the Polyplas plant in the Villas Agricolas neighborhood in Santo Domingo, Dominican Republic, Wednesday, Dec. 5, 2018. The mayor told reporters the fire began when a boiler exploded early Wednesday afternoon at the plastics company. Authorities say at least two people have died. (AP Photo/Tatiana Fernandez)

A car is covered in debris next to a collapsed building, both damaged in an explosion at the Polyplas plant in the Villas Agricolas neighborhood in Santo Domingo, Dominican Republic, Wednesday, Dec. 5, 2018. The mayor told reporters the fire began when a boiler exploded early Wednesday afternoon at the plastics company. Authorities say at least two people have died. (AP Photo/Tatiana Fernandez)

A resident makes a photo from a rooftop, of a black plume of smoke caused by a nearby explosion at the Polyplas plant in the Villas Agricolas neighborhood in Santo Domingo, Dominican Republic, Wednesday, Dec. 5, 2018. The mayor told reporters the fire began when a boiler exploded early Wednesday afternoon at the plastics company. Authorities say at least two people have died. (AP Photo/Tatiana Fernandez)

Residents stand behind caution tape after an explosion at the nearby Polyplas plant in the Villas Agricolas neighborhood in Santo Domingo, Dominican Republic, Wednesday, Dec. 5, 2018. The mayor told reporters the fire began when a boiler exploded early Wednesday afternoon at the plastics company. Authorities say several people have died and dozens are injured. (AP Photo/Tatiana Fernandez)

Residents watch first responders in the search and rescue efforts after an explosion at the Polyplas plant in the Villas Agricolas neighborhood in Santo Domingo, Dominican Republic, Wednesday, Dec. 5, 2018. The mayor told reporters the fire began when a boiler exploded early Wednesday afternoon at the plastics company. Authorities say at least two people have died. (AP Photo/Tatiana Fernandez)

Residents make photos of the damaged caused by an explosion at the Polyplas plant in the Villas Agricolas neighborhood in Santo Domingo, Dominican Republic, Wednesday, Dec. 5, 2018. The mayor told reporters the fire began when a boiler exploded early Wednesday afternoon at the plastics company. Authorities say several people have died and dozens are injured. (AP Photo/Tatiana Fernandez)

Piles of debris caused by a major explosion at the Polyplas plant, fill the landscape in the Villas Agricolas neighborhood in Santo Domingo, Dominican Republic, Wednesday, Dec. 5, 2018. The mayor told reporters a fire began when the boiler exploded early Wednesday afternoon at the plastics company. Authorities say several people have died and dozens have been injured. (AP Photo/Tatiana Fernandez)

Partially blown out windows stand askew in a schoolroom after an explosion at the nearby Polyplas plant in the Villas Agricolas neighborhood in Santo Domingo, Dominican Republic, Wednesday, Dec. 5, 2018. The mayor told reporters a fire began when the boiler exploded early Wednesday afternoon at the plastics company. Authorities say several people have died and dozens have been injured. (AP Photo/Tatiana Fernandez)

Mayor David Collado speaks to the reporters about a massive explosion at the Polyplas plant in the Villas Agricolas neighborhood in Santo Domingo, Dominican Republic, Wednesday, Dec. 5, 2018. The mayor said the fire began when a boiler exploded early Wednesday afternoon at the plastics company. (AP Photo/Tatiana Fernandez)

05 December 2018, Dominican Republic, Santo Domingo: A soldier stands on a blocked road in action after a strong explosion in a plastic factory. According to the newspaper, the shock was felt in large parts of the city. The causes of the explosion are still unclear. Photo: Pedro Bazil/dpa

05 December 2018, Dominican Republic, Santo Domingo: Rescue units are working in a plastic factory after a major explosion. According to the newspaper, the shock was felt in large parts of the city. The causes of the explosion are still unclear. Photo: Pedro Bazil/dpa

05 December 2018, Dominican Republic, Santo Domingo: Rescue units are working in a plastic factory after a major explosion. According to the newspaper, the shock was felt in large parts of the city. The causes of the explosion are still unclear. Photo: Pedro Bazil/dpa

05 December 2018, Dominican Republic, Santo Domingo: Residents of a plastic factory discuss with security forces after a strong explosion. The shock in the factory destroyed surrounding houses and, according to the newspaper, was felt in large parts of the city. The causes of the explosion are still unclear. Photo: Pedro Bazil/dpa

05 December 2018, Dominican Republic, Santo Domingo: Rescue units are working in a plastic factory after a major explosion. According to the newspaper, the shock was felt in large parts of the city. The causes of the explosion are still unclear. Photo: Pedro Bazil/dpa

05 December 2018, Dominican Republic, Santo Domingo: Inhabitants watch as smoke rises from a plastic factory after an explosion. The reason for the explosion was initially unclear. According to the newspaper, the shock was felt in large parts of the city. The causes of the explosion are still unclear. Photo: Pedro Bazil/dpa

05 December 2018, Dominican Republic, Santo Domingo: Victor Rodriguez is investigating the damage caused by the explosion at a plastic factory in his home. The house is located 200 meters from the factory. When it exploded, Rodriguez was in the house with his father and sister. According to the newspaper, the shock was felt in large parts of the city. The causes of the explosion are still unclear. Photo: Pedro Bazil/dpa

05 December 2018, Dominican Republic, Santo Domingo: Rescue units are working in a plastic factory after a major explosion. According to the newspaper, the shock was felt in large parts of the city. The causes of the explosion are still unclear. Photo: Pedro Bazil/dpa

05 December 2018, Dominican Republic, Santo Domingo: Miguel David Collado Morales, Mayor of Santo Domingo, talks to journalists after the explosion in a plastic factory. According to the newspaper, the shock was felt in large parts of the city. The causes of the explosion are still unclear. Photo: Pedro Bazil/dpa