Twenty five people including five children, were killed Wednesday in raids that targeted the province of Idilb in north-western Syria, a monitor group said.
"Fifteen civilians and 10 fighters from Islamic groups were killed when raids targeted the city of Idlib," the head of the Britain-based Syrian Observatory for Human Rights told dpa.
He said the number is likely to increase due severe injuries among the wounded.
Several other raids targeted the cities of Khan Sheikhoun and Benish, in Idlib's countryside, Abdel Rahman said without specifying casualties.
Idlib city and the province by the same name is held by a coalition of rebel groups, including Jabhat Fatah al-Sham (Front for the Conquest of Levant), previously known as al-Nusra Front.