A dentist and five members of a family, including two children, were among those killed "by airstrikes targeting al Quds Hospital and a nearby residential building in al Sukkari neighbourhood in eastern Aleppo," the volunteers said late yesterday.
A doctor who was the only paediatrician in the rebel-held eastern neighbourhoods of Aleppo was also among the dead, an AFP correspondent on the ground said.
The Syrian Observatory for Human Rights monitoring group confirmed the raids were carried out by "regime airplanes" and said two hospital guards and a doctor were among the dead.
Rescuers were at the scene searching for victims trapped under the rubble, the AFP correspondent said.
Also Read
Separately, 11 people were killed in western parts of Aleppo earlier yesterday, according to the Syrian Observatory. State news agency SANA blamed the rocket and gunfire on Al-Qaeda affiliate Al-Nusra Front and its allies.
Also earlier in the day, five civilians were killed in two neighbourhoods in eastern Aleppo, according to the White Helmets. An AFP correspondent said that regime aircraft targeted one area with barrel bombs and another with missiles.
Once Syria's commercial hub, northwestern Aleppo has been divided between rebel control in the east and government forces in the west since 2012.
The fighting has put the ceasefire in jeopardy and overshadowed a new round of UN-brokered peace talks in Geneva that were entering a recess yesterday.
More than 270,000 people have been killed in Syria and millions been forced from their homes since the conflict erupted in 2011.