At least 23 people were killed in Russian air strikes overnight in the Syrian rebel-held city of Idlib, the heaviest bombardment there since a cessation of hostilities was agreed in February, the Syrian Observatory for Human Rights said.
The Observatory said the air strikes targeted a number of positions in the city, one of them next to a hospital. Seven children were among the dead, Observatory Director Rami Abdulrahman said. The toll was likely to rise.
Idlib is a stronghold of rebel groups including the al Qaeda-linked Nusra Front.