A series of air strikes believed to have been carried out by Russian planes have killed at least 43 people in the Syrian city of Idlib.
According to activists and residents, a marketplace, homes and official buildings were all hit.
A civil defence worker said bodies were still being pulled from the rubble.
Russian authorities have not confirmed whether it carried out strikes in the area.
The local co-ordination committees, a network of anti-regime activists, said that more than 170 people were injured in the strikes.
Reports say a coalition of Islamist anti-government rebels had captured the city of Idlib earlier in 2015.
Meanwhile, latest research indicates that at least 15 rebel forces in Syria are ready to succeed Islamic State if it is defeated by the US-led coalition.