Syria crisis: 'Dozens killed' in huge Hama blast
Up to 70 people have been killed in an attack on a house in Hama, according to Syrian activists.
They said several houses in the Masha at-Tayyar district in southern Hama were destroyed by a big explosion.
Syrian state media said 16 people died in the blast in a house used as a bomb factory by "armed terrorist groups".
The violence comes despite a UN-brokered ceasefire - part of a peace plan proposed by the joint UN-Arab League envoy Kofi Annan.
Jim Muir reports from Beirut.