The Syrian army rained shells on rebel bastions in and around Damascus on Tuesday and sent extra troops to second city Aleppo, as a watchdog said the death toll from 18 months of violence now tops 31,000. The fresh offensive came hours after UN chief Ban Ki-moon urged Damascus to show compassion to its people and Syrian Foreign Minister Walid Muallem said a political solution was still possible if the West and Gulf states halted support for the rebels. A bombardment by the army of the rebel-held Harasta district in the eastern suburbs of the capital killed at least 11 people, two of them women, the Syrian Observatory for Human Rights said. At least five civilians were killed in shelling in the city of Douma, northeast of Damascus, the Britain-based watchdog said. Amateur video posted by activists showed several vehicles carrying women driving off under cover of darkness in what they said was an exodus of Douma residents. The army also bombarded a string of other towns outside Damascus, the Observatory said. Activist network the Local Coordination Committees said more than 100 shells fell on Zabadani, once a resort destination known for its mild weather and scenic views but now devastated by the civil war ravaging Syria. The official daily Al-Baath said on Tuesday that the "end of security operations throughout Damascus province" was approaching. Government forces "have destroyed many weapons caches and seized large quantities of ammunition and equipment... which indicates that the end of security operations throughout Damascus province is approaching," the newspaper said. On July 18, rebels carried out a massive bombing on a complex in Damascus, killing four security chiefs, including Assad's brother-in-law and the defence minister.