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An explosion has killed at least 112 people, including children, government supporters and opposition fighters who were part of a bus convoy waiting to cross into government-held Aleppo in Syria.
The blast ripped through the bus depot in the al-Rashideen area where thousands of government loyalists evacuated the day before waited restlessly for hours, as opposition fighters guarded the area while negotiators bickered over the completion of the transfer deal.
Only metres away, hundreds of evacuees from pro-rebels areas also loitered in a walled-off parking lot, guarded by government troops.
Footage from the scene showed bodies, including those of fighters, lying alongside buses, some of which were charred and others gutted from the blast. Personal belongings could be seen dangling out of the windows. Fires raged from a number of vehicles as rescuers struggled to put them out.
The scenes were the last in the unyielding bloodshed Syrians are living through. Earlier this month, at least 89 people were killed in a chemical attack as children foaming at the mouth and adults gasping for last breath were also caught on camera.
The bloody mayhem that followed the Saturday attack only deepened the resentment of the transfer criticised as population engineering.
It also reflected the chaos surrounding negotiations between the warring parties. The United Nations did not oversee the transfer deal of the villages of Foua and Kfraya, besieged by the rebels, and Madaya and Zabadani, encircled by the government.
No one claimed responsibility for the attack but pro-government media and the opposition exchanged accusations, each pointing to foreign interference or conspiracies undermining the deal.
State TV al-Ikhbariya said the attack was the result of a car bomb carrying food aid to be delivered to the evacuees in the rebel-held area - ostensibly crisps for the children - and accused rebel groups of carrying it out.
Critics say the string of evacuations, which could see some 30,000 people moved across battle lines over the next 60 days, amounts to forced displacement along political and sectarian lines.
The explosion came as frustration was already mounting over the stalling evacuation process.