At least 68 children were among 126 people killed in Saturday's bomb attack on buses carrying evacuees from besieged Syrian towns, activists say.
The UK-based Syrian Observatory for Human Rights monitoring group said at least 109 evacuees from government-held towns were killed, along with aid workers and rebel soldiers.
The explosion shattered buses and set cars on fire, leaving a trail of bodies, as the convoy waited in rebel territory near Aleppo.
Separately, several people, mostly children, are reported to have been injured by shelling in the capital, Damascus.
At least three shells landed near the central Umayyad Square, state and pro-government media outlets reported.
In his Easter Sunday address, Pope Francis called the bombing a "vile attack on fleeing refugees".
A previous attempt at mutual evacuations failed in December when rebels burnt coaches due to be sent to the towns. »