Hundreds of fighters evacuated by the Syrian regime from their Eastern Ghouta bastion arrived in rebel-held Idlib province on Friday as Russia continued its deadly assault on the enclave near Damascus. Buses carrying the fighters from Ahrar al-Sham group and their families entered the northwestern province of Idlib after their evacuation from the rebel-held town of Harasta in Eastern Ghouta on Thursday, the Britain-based Syrian Observatory for Human Rights said. The evacuation from Harasta comes as part of a Russian-sponsored agreement after the Syrian regime’s air and ground offensive on Eastern Ghouta, which was launched on February 18, retook 80 percent of the last rebel bastion near Damascus. The Observatory says the assault divided what remains of Eastern Ghouta’s rebel-controlled territory into three shrinking pockets, each falling under a different rebel group. As the evacuees were on their way to Idlib, Russian air strikes killed 37 civilians in the Arbin area of Eastern Ghouta overnight, the Observatory said on Friday. "Russian air strikes and incendiary weapons killed the civilians in a basement from burning or suffocation" late on Thursday before a ceasefire came into effect in the area, Observatory head Rami Abdel Rahman said. The White Helmets said most of the dead were women and children. In an image they shared on social media, rescue workers wrapped a blackened body in a blanket. Late on Thursday, the Faylaq al-Rahman group which controls the southern pocket that includes Arbin, said a ceasefire had been agreed from midnight to allow negotiations with Russia for an evacuation deal. The rebel fighters and their family members were evacuated from the town of Harasta earlier on Thursday under a similar agreement reached by the Ahrar al-Sham group. The ceasefire announcement came after air strikes killed 38 people in Arbin and Zamalka, another town controlled by Faylaq al-Rahman, earlier on Thursday, the Observatory said.