The authorities in the city of al-Hasaka in northeast Syria have imposed a curfew amid the search for the perpetrators of the attack on the Ghwayran prison who attempted to free terrorists belonging to the Islamic State (banned in Russia), Syrian Democratic Council (SDC) Representative in the United States Bassam Saker told Sputnik

The sources say that the officials of law enforcement agencies have shifted the suspects to some unknown place for interrogation.