AZAZ, SYRIA - DECEMBER 12: Opposition forces wait near a damaged building after a car bombing in the opposition-held Azaz town in northern Syria on December 12, 2018. At least one person was killed and 21 others were injured. Rescuers from the White Helmets and the Turkish Humanitarian Relief Foundation (IHH) rushed to the scene of the attack to search for survivors. Ali Imran / Anadolu Agency/ABACAPRESS.COM

AZAZ, SYRIA - DECEMBER 12: A damaged building is seen after a car bombing in the opposition-held Azaz town in northern Syria on December 12, 2018. At least one person was killed and 21 others were injured. Rescuers from the White Helmets and the Turkish Humanitarian Relief Foundation (IHH) rushed to the scene of the attack to search for survivors. Ali Imran / Anadolu Agency/ABACAPRESS.COM

AZAZ, SYRIA - DECEMBER 12: A damaged building is seen after a car bombing in the opposition-held Azaz town in northern Syria on December 12, 2018. At least one person was killed and 21 others were injured. Rescuers from the White Helmets and the Turkish Humanitarian Relief Foundation (IHH) rushed to the scene of the attack to search for survivors. Ali Imran / Anadolu Agency/ABACAPRESS.COM

AZAZ, SYRIA - DECEMBER 12: Rescuers from the White Helmets and the Turkish Humanitarian Relief Foundation (IHH) search for the survivors after a car bombing in the opposition-held Azaz town in northern Syria on December 12, 2018. At least one person was killed and 21 others were injured. Ali Imran / Anadolu Agency/ABACAPRESS.COM

AZAZ, SYRIA - DECEMBER 12: Rescuers from the White Helmets and the Turkish Humanitarian Relief Foundation (IHH) search for the survivors after a car bombing in the opposition-held Azaz town in northern Syria on December 12, 2018. At least one person was killed and 21 others were injured. Ali Imran / Anadolu Agency/ABACAPRESS.COM

AZAZ, SYRIA - DECEMBER 12: Rescuers from the White Helmets and the Turkish Humanitarian Relief Foundation (IHH) search for the survivors after a car bombing in the opposition-held Azaz town in northern Syria on December 12, 2018. At least one person was killed and 21 others were injured. Ali Imran / Anadolu Agency/ABACAPRESS.COM

AZAZ, SYRIA - DECEMBER 12: Rescuers from the White Helmets and the Turkish Humanitarian Relief Foundation (IHH) search for the survivors after a car bombing in the opposition-held Azaz town in northern Syria on December 12, 2018. At least one person was killed and 21 others were injured. Ali Imran / Anadolu Agency/ABACAPRESS.COM

AZAZ, SYRIA - DECEMBER 12: Rescuers from the White Helmets and the Turkish Humanitarian Relief Foundation (IHH) search for the survivors after a car bombing in the opposition-held Azaz town in northern Syria on December 12, 2018. At least one person was killed and 21 others were injured. Ali Imran / Anadolu Agency/ABACAPRESS.COM

AZAZ, SYRIA - DECEMBER 12: Rescuers from the White Helmets and the Turkish Humanitarian Relief Foundation (IHH) search for the survivors after a car bombing in the opposition-held Azaz town in northern Syria on December 12, 2018. At least one person was killed and 21 others were injured. Ali Imran / Anadolu Agency/ABACAPRESS.COM

AZAZ, SYRIA - DECEMBER 12: Rescuers from the White Helmets and the Turkish Humanitarian Relief Foundation (IHH) search for the survivors after a car bombing in the opposition-held Azaz town in northern Syria on December 12, 2018. At least one person was killed and 21 others were injured. Ali Imran / Anadolu Agency/ABACAPRESS.COM

AZAZ, SYRIA - DECEMBER 12: A wreckage of a car is seen after a car bombing in the opposition-held Azaz town in northern Syria on December 12, 2018. At least one person was killed and 21 others were injured. Rescuers from the White Helmets and the Turkish Humanitarian Relief Foundation (IHH) rushed to the scene of the attack to search for survivors. Ali Imran / Anadolu Agency/ABACAPRESS.COM

AZAZ, SYRIA - DECEMBER 12: A wreckage of a car is seen after a car bombing in the opposition-held Azaz town in northern Syria on December 12, 2018. At least one person was killed and 21 others were injured. Rescuers from the White Helmets and the Turkish Humanitarian Relief Foundation (IHH) rushed to the scene of the attack to search for survivors. Ali Imran / Anadolu Agency/ABACAPRESS.COM

AZAZ, SYRIA - DECEMBER 12: Locals and Civil defence team members stage rescue operation after a car bombing in the opposition-held Azaz town in northern Syria on December 12, 2018. At least one person was killed and 21 others were injured. Rescuers from the White Helmets and the Turkish Humanitarian Relief Foundation (IHH) rushed to the scene of the attack to search for survivors. Ali Imran / Anadolu Agency/ABACAPRESS.COM

ALEPPO, SYRIA - DECEMBER 12: (EDITORS NOTE: Image depicts graphic content) An injured man is seen after a bomb-laden vehicle exploded near a hospital in Azaz district of Aleppo, Syria on December 12, 2018. Nayif Abbud / Anadolu Agency/ABACAPRESS.COM

AZAZ, SYRIA - DECEMBER 12: A wreckage of a car is seen after a car bombing in the opposition-held Azaz town in northern Syria on December 12, 2018. At least one person was killed and 21 others were injured. Rescuers from the White Helmets and the Turkish Humanitarian Relief Foundation (IHH) rushed to the scene of the attack to search for survivors. Ali Imran / Anadolu Agency/ABACAPRESS.COM

ALEPPO, SYRIA - DECEMBER 12: Smoke rises as civil defense members conduct search and rescue operations on the ruins after a bomb-laden vehicle exploded near a hospital in Azaz district of Aleppo, Syria on December 12, 2018. Nayif Abbud / Anadolu Agency/ABACAPRESS.COM

ALEPPO, SYRIA - DECEMBER 12: An injured man is being carried on a stretcher after a bomb-laden vehicle exploded near a hospital in Azaz district of Aleppo, Syria on December 12, 2018. Nayif Abbud / Anadolu Agency/ABACAPRESS.COM

ALEPPO, SYRIA - DECEMBER 12: People inspect the blast site as civil defense members conduct search and rescue operations on the ruins after a bomb-laden vehicle exploded near a hospital in Azaz district of Aleppo, Syria on December 12, 2018. Nayif Abbud / Anadolu Agency/ABACAPRESS.COM

ALEPPO, SYRIA - DECEMBER 12: People inspect the blast site as civil defense members conduct search and rescue operations on the ruins after a bomb-laden vehicle exploded near a hospital in Azaz district of Aleppo, Syria on December 12, 2018. Nayif Abbud / Anadolu Agency/ABACAPRESS.COM

ALEPPO, SYRIA - DECEMBER 12: Smoke rises as civil defense members conduct search and rescue operations on the ruins after a bomb-laden vehicle exploded near a hospital in Azaz district of Aleppo, Syria on December 12, 2018. Nayif Abbud / Anadolu Agency/ABACAPRESS.COM

ALEPPO, SYRIA - DECEMBER 12: People inspect the blast site as civil defense members conduct search and rescue operations on the ruins after a bomb-laden vehicle exploded near a hospital in Azaz district of Aleppo, Syria on December 12, 2018. Nayif Abbud / Anadolu Agency/ABACAPRESS.COM

ALEPPO, SYRIA - DECEMBER 12: People inspect the blast site as civil defense members conduct search and rescue operations on the ruins after a bomb-laden vehicle exploded near a hospital in Azaz district of Aleppo, Syria on December 12, 2018. Nayif Abbud / Anadolu Agency/ABACAPRESS.COM

AZAZ, SYRIA - DECEMBER 12: A damaged building is seen after a car bombing in the opposition-held Azaz town in northern Syria on December 12, 2018. At least one person was killed and 21 others were injured. Rescuers from the White Helmets and the Turkish Humanitarian Relief Foundation (IHH) rushed to the scene of the attack to search for survivors. Ali Imran / Anadolu Agency/ABACAPRESS.COM