A mortar round hit an anti-regime protest in a city in eastern Syria Tuesday, killing at least 10 people, a human rights watchdog group reported.

Heavy mortar shelling was reported in Deir el-Zour with the pro-regime forces targeting homes even as the protestors were dispersing, the UK-based Syrian Observatory for Human Rights and the Local Coordination Committees (LCC) reported. Three houses were entirely demolished in the latest attack.

The mortar attack closely followed a report late Monday of a car bomb attack killing at least a dozen people in Deir el-Zour, close to the border with Iraq.

According to an LCC report, Monday ended with 109 deaths and the dead included women, children, defected soldiers and victims of an explosion.

The casualties were distributed across Syria with 36 deaths in Idlib, 19 in Deir Ezzor, 17 in Homs, 15 in Hama, eight in Damascus Suburbs, six in Lattakia, five in Aleppo, two in Barzeh and Damascus and one in Daraa.

The uprising has resulted in the killing of more than 13,500 people so far, most of them civilians.

Shabbiha, considered an Alawite group with Shi'ite leanings, has allegedly been responsible for the killings of civilians belonging to the Sunni majority.