But Damascus and Moscow ― whose warplanes launched the vast majority of such assaults ― still deny that hospitals are being targeted.
At least seven children died in rebel-held Idlib province.
The move comes ahead of a “humanitarian pause” meant to allow civilians and rebels to leave the city.
He says it’s essential to evacuate civilians, 'especially children, who are still trapped by cruel bombardments'.
The U.S. government says otherwise.
The area had been liberated from the Islamic State in August.
Russia denies U.S. accusations that its warplanes were behind the attack.
Some 275,000 people are under fire in the rebel-held area of the city.
“It was the heaviest airstrikes for months inside Aleppo city.”
Moscow is stepping up a war of words with Washington.