Violence returned to Aleppo this week despite a cease-fire and new efforts by Russia and Turkey to ensure the remaining rebel fighters can leave the city in the hands of Syrian dictator Bashar Assad, according to reports.

“So far nobody has been evacuated,” the New York Times reporter Anne Barnard told NPR. “The first convoy that attempted to leave was stopped by the Iranian-backed Shiite militias that have been helping the Syrian government on the ground. It seems that Iran and the Syrian government were not pleased that Turkey and Russia struck a deal without them.”