Syria: UN observers visit site of reported massacre We were informed yesterday that there was a ceasefire. So we sent a patrol to Tremseh on a reconnaissance mission. The patrol assessed the situation, ie if there was in fact a ceasefire and our access to the town," she said, adding that the patrol would seek "verification of the facts." The head of Syrian Observatory for Human Rights, Rami Abdel Rahman, said it "might be the biggest massacre committed in Syria since the start of the revolution" against Assad in March 2011. If confirmed, the 150-person toll would exceed that of a massacre at Houla on May 25, when a pro-Assad militia and government forces were accused of killing at least 108 people. A spokesman for Syria's military said the army killed "many terrorists" in Tremseh, but no civilians, in a "special operation... targeting armed terrorist groups and their leadership hide-outs." Tremseh residents told the Daily Telegraph that they emerged from their homes on Friday morning following an artillery bombardment during the night to find the streets littered with corpses.