Story highlights An airstrike took out three floors of a children's hospital, a medical charity says

At least 68 are killed Saturday in eastern Aleppo, a volunteer group says

(CNN) Days of heavy airstrikes have left Syria's rebel-held eastern Aleppo without a single hospital operating at full capacity, the Syrian American Medical Society told CNN on Saturday.

The sobering news, following a week of intense airstrikes, came the same day that at least 68 civilians were killed in eastern Aleppo, according to the activist group Aleppo Media Center. In the city's east, "dozens are injured and many are in serious condition" and "large scale destruction" can be seen throughout, Aleppo Media Center activist said.

A number of major trauma hospitals were knocked out of service during recent attacks, according to the medical society.

However, activists working in the city said as many as five other hospitals in eastern neighborhoods are still functioning.

"For the first time, eastern Aleppo is out of hospitals operating at full capacity," said Dr. Mazen Kewara, director of the medical society's Turkey office. "There are remaining medical facilities, but they are not operating at full capacity."

Read More