BEIRUT (Reuters) - Syrian President Bashar al-Assad declared on Tuesday that his country was at war and ordered his new government to spare no effort to achieve victory, as the worst fighting of the 16-month conflict reached the outskirts of the capital.

Video published by activists recorded heavy gunfire and explosions in suburbs of Damascus. A trail of fresh blood on a sidewalk in the suburb of Qudsiya led into a building where one casualty was taken. A naked man writhed in pain, his body pierced by shrapnel.

Syria's state news agency SANA said "armed terrorist groups" had blocked the old road from Damascus to Beirut.