In Syria, a chlorine gas attack has reportedly been carried out on a rebel-held enclave on the outskirts of capital Damascus. <br/><br/>BBC reports that people in the Eastern Ghouta region, which is under daily bombardment, reported a smell of gas after a missile strike. It said, six people were treated for minor breathing problems.<br/><br/>A number of chlorine gas attacks have been reported since Syria's civil war broke out, but the government has always denied using chemical agents.<br/><br/>