Story highlights Russia says it will stop airstrikes in Aleppo for eight hours on Thursday

Russians have helped bolster the Syrian army's air attack on rebel-held parts of Aleppo

(CNN) Hours after airstrikes killed 20 members of the same family -- including nine children -- in Aleppo, Russia announced it will temporarily stop airstrikes on the rebel-held eastern part of the city.

Moscow has helped bolster the Syrian regime's airstrikes on rebel-held parts of Aleppo, Syria's largest city and the site of a humanitarian catastrophe

Gen. Sergey Rudskoy announced airstrikes will stop for eight hours Thursday, starting at 8 a.m.

He also urged rebels to leave the city via two corridors to Idlib.

"These same corridors can be used to evacuate the sick and wounded," Rudskoy -- the chief of the main operations department of the Russian General Staff -- said, according to Russian state-run media. "Six corridors will be opened for the passage of civilians."

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