Syrian and Russian aircraft pounded rebel-held areas of Aleppo on Friday, a monitor said, after the army announced a new offensive aimed at retaking all of the divided second city.
At least 30 strikes hit the rebel-held east of the city during the night and early on Friday, killing at least three people, the Syrian Observatory for Human Rights said.
The Britain-based monitoring group said that dozens of people were wounded and that more dead were feared buried under the rubble.
Two civil defense centers were damaged in the bombardment, an AFP correspondent reported.
Russian warplanes were carrying out strikes alongside Syrian aircraft, Observatory chief Rami Abdel Rahman said.
“The Syrians are dropping barrel bombs and the Russian planes are launching strikes,” he told AFP.
The raids came after the Syrian army announced late on Thursday that it was launching a new offensive to retake rebel-held parts of the city.