The fierce battle for Syria’s largest city intensified Sunday, with a civilian hospital attacked and pro-regime forces gaining ground in Aleppo.

Government forces now control the strategic area around al-Kindi Hospital in northern Aleppo, pro-regime media and activists said, strengthening their push toward the rebel-held eastern part of the city.

While the regime gained power on the ground, more airstrikes fell on rebel-held eastern Aleppo Sunday, several residents told CNN.

“Indiscriminate bombing and shelling continues in a shocking and unrelenting manner, killing and maiming civilians, subjecting them to a level of savagery that no human should have to endure,” United Nations aid chief Stephen O’Brien said Sunday.