Syrian Troops and Rebels Clash Across Country Activists are reporting that Syrian troops and helicopters are clashing with rebels in the central town of Rastan. The Britain-based Syrian Observatory for Human Rights and the Local Coordination Committees are also reporting government shelling Monday in the central provinces of Homs and Hama, the southern region of Daraa, the northern province of Aleppo, suburbs of the capital Damascus and Deir el-Zour in the east. This image made from video released by UNSMIS, the UN observer mission in Syria and accessed Saturday, June 9, 2012, purports to show destroyed buses after overnight fighting in Damascus, Syria. In Damascus, residents spoke about a night of shooting and explosions in the worst violence Syria's capital has seen since the uprising against President Bashar Assad's regime began 15 months ago. (AP Photo/UNSMIS via AP video) THE ASSOCIATED PRESS CANNOT INDEPENDENTLY VERIFY THE CONTENT, DATE, LOCATION OR AUTHENTICITY OF THIS MATERIAL Close The Observatory said government forces used helicopters in their attacks on Rastan, which is held by the rebels. Violence has intensified recently despite that an internationally-brokered cease-fire went into effect on April 12. The truce was repeatedly violated.