As a result of Friday night air strike on a prison in Syria's rebel-held Idlib province, at least 16 people died, according to Reuters referring to Syrian Observatory for Human Rights based in Britain.
Two jailers were among victims. Some of the prisoners were killed by prison staff while trying to flee after the airstrike.
Idlib is an important stronghold for rebels and also controlled by jihadist factions. The city is often shelled by the Syrian army.