Activists say Russian air strikes on a prison complex run by Al-Qaeda's Syrian affiliate in Syria have killed nearly 60 people.
The January 9 strikes hit an Al-Nusra Front building, located near a popular market in Maarat al-Numan in the northwestern province of Idlib, the Syrian Observatory for Human Rights said.
The British-based monitoring group said the raids killed 57 people, including civilians, militants, and detainees, while 30 others were wounded.
It said the strikes were carried out by Russian warplanes.
Russia has been conducting air strikes in Syria since September 30 to support the embattled Syrian President Bashar al-Assad, a Kremlin ally.
More than 250,000 Syrians have been killed in almost five years of conflict, which began with antigovernment protests.