Damascus: A bomb attack on a bus carrying civilians and troops in the central Syrian province of Homs killed at least four people and wounded dozens more on Sunday, state media and a rights watchdog said.

“Four people were killed and others wounded in an explosion by a bomb which was planted by a terrorist group in a bus on the route from Homs to Messyaf,” said state television.

The Syrian Observatory for Human Rights also reported the attack.

Two explosive devices were detonated as the bus travelled along the Homs-Messyaf highway linking the provinces of Homs and Hama, according to the Britain-based group.

“We know for sure that four people were killed but we don’t know if they were civilians or military,” the Observatory’s Rami Abdel Rahman told AFP on the phone.

“It was a large bus and there are dozens of casualties,” Abdul Rahman said, adding that “the bombs were planted on the road.