The airstrikes came a day after an air raid hit eastern Aleppo's biggest market, killing at least 15 people and leveling buildings. At least 65 people have been killed in Aleppo's rebel-held eastern districts in the last three days.
The Britain-based Syrian Observatory for Human Rights reported more than 20 airstrikes on eastern Aleppo that killed seven while shelling killed four, adding that clashes were taking place between government forces and insurgents on the city's northern edge.
Ibrahim Alhaj, a member of the Syrian Civil Defense, said the airstrikes killed 13 and wounded 25. He said some people remained buried under the rubble and search operations are underway.
State media reported that two girls were killed and five were wounded in rebel shelling of western government-held neighborhoods in Aleppo that hit a school in the Suleimaniyah neighborhood.
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The Observatory said yesterday that at least 358 civilians have been killed in eastern Aleppo since a US and Russian-brokered truce collapsed on September 19. The UN says over 100 children have been killed in the campaign, which has also included a limited ground offensive.
The Observatory said the evacuation is part of an agreement between rebel factions in the two suburbs and the government that would include giving partial amnesty to some 300 fighters from the area.
It said that after the evacuation ends, government forces would take control of the two areas. Such evacuations have been carried out in other suburbs of the capital in recent months, including Daraya and Moadamiyeh.