Air strikes mostly hit the Bustan al-Qasr neighbourhood, Zakaria Malhifji of the Aleppo-based Fastaqim rebel group told Reuters.
"There is renewed bombardment and it is heavy," he said.
Fighters from the Free Syrian Army take part in a battle against the Islamic State (IS) group jihadists in the northern Syrian village of Yahmoul in the Marj Dabiq area north of the embattled city of Aleppo
Russian jets resumed heavy bombing of rebel-held eastern Aleppo on Tuesday after several days of relative calm, a rebel official and the Britain-based Syrian Observatory for Human Rights monitoring group said.
