A wave of airstrikes and shelling killed more than 60 people in less than 24 hours in the northern Syrian city of Aleppo, monitors and activists said Thursday.
The contested city is now one of the main battlegrounds of Syria's devastating civil war, with a cease-fire that has collapsed and peace talks in Geneva stalled.
At least 27 people died as a hospital supported by Doctors Without Borders and the International Committee for the Red Cross and nearby buildings were hit overnight in the rebel-held part of Aleppo.
The chief Syrian opposition negotiator Mohammed Alloush blamed the government of President Bashar Assad for the violence.
He denounced the intensive bombing as an attempt by Assad's government to drive the residents of Aleppo out, labelling it "a crime of ethnic and sectarian cleansing."