Air strikes in northwestern Syria on Thursday, thought to have been carried out by regime ally Russia, killed 11 civilians including two children, a British-based monitor said.
The raids, which hit a residential zone in the area of Zardana in the northwestern province of Idlib, also wounded 50 people, the Syrian Observatory for Human Rights monitoring group said.
The monitor says it relies on sources inside Syria for its information and determines who carried out strikes according to flight patterns, as well as planes and ammunition involved.
The toll is likely to increase due to a number of victims still under the rubble, Observatory head Rami Abdel Rahman said.
Most of Idlib province lies beyond government control and is held by an array of rebels and jihadists.