Syrian activists say a mortar round has hit a Damascus suburb, killing a man and his four children.

The British-Based Syrian Observatory for Human Rights said Monday that the round landed on the man's car in the residential area of Jaramana. The Observatory said many more were wounded, including the children's mother.

It was part of a series of salvos that slammed into the neighborhood on Sunday evening.

It wasn't clear who fired the shells. There are frequent clashes in a nearby town between Syrian forces loyal to the government of President Bashar Assad and rebels trying to overthrow him.

The Observatory receives its information from a network of activists on the ground.

The Syrian news agency SANA reported the same incident but said three children were killed.