United Nations chief Ban Ki-moon has called for an investigation over Wednesday's alleged gas attack in the suburbs of Damascus. <br /><br />Distressing footage has been shown of what the Syrian opposition claims are the after effects of rocket fire, which released deadly fumes over rebel-held areas.<br /><br />Up to 1,300 people are said to have been killed.<br /><br />...<br />http://www.euronews.net/