A series of strikes, believed to be from Russian planes, have killed 43 people in the Syrian city of Idlib on Sunday (local time).
Homes, official buildings and a marketplace were hit by at least six strikes with bodies still being pulled from the rubble, BBC reports. Thirty bodies have not yet been identified.
Russia has been in the midst of an air campaign in support of Syrian president Bashar al-Assad since September, but has not confirmed if it carried out these strikes.
More than 170 people are believed to be injured in the strikes, with serious cases being treated in hospitals in Turkey, The Guardian reports.
Idlib is the capital of a northwestern province, which was captured earlier this year by a coalition of Islamist insurgent groups.
Russia says it targets only "terrorists", specifically the Islamic State, but activists say strikes have mainly hit Western-backed rebel groups.