Story highlights Health care stretched thin in Aleppo

At least 85 killed, 300 injured

(CNN) Syrian forces pounded rebel-held eastern Aleppo on Sunday, killing at least 85 people and wounding more than 300 others, an activist group reported. The bombardment destroyed residential centers, overwhelmed hospitals and angered diplomats meeting at the United Nations.

"Everyone in Aleppo is depressed," an activist on the ground told CNN.

JUST WATCHED Can Russia and US reach common ground on Syria? Replay More Videos ... MUST WATCH Can Russia and US reach common ground on Syria? 01:53

"They don't know what they have done to become targets for warplanes. Fear is clear in the eyes of anyone you see walking the streets of Aleppo. Yesterday I saw a woman walking on the street and crying , no clear reason, just crying."

Hospitals overwhelmed

Hundreds of airstrikes have pummeled the city, home to more than 250,000 people, since the Syrian government, backed by Russia, announced a renewed, "comprehensive" offensive Thursday following the collapse of a short-lived ceasefire.

Read More