Six U.N. vehicles left the Four Seasons hotel in Damascus on Wednesday and were understood to be travelling to the area.<br/> <br />U.N. High Representative for Disarmament Affairs Angela Kane was on hand to watch the convoy depart.<br/> <br />The team delayed a visit due on Tuesday for safety reasons after being shot by unknown snipers during a first site visit.<br/> <br />Opponents of Syrian President Bashar al-Assad say his forces used rockets loaded with poison gas in the middle of a fierce offensive on the Damascus outskirts, with activists putting the death toll between 500 and more than 1,000. Assad denies the charges.