A major Syrian opposition group said Wednesday over 1,300 people were killed in fighting near Damascus that involved the use of chemical weapons.
The group said President Bashar al-Assad's forces launched a rocket attack against several opposition strongholds near the Syrian capital.
Video footage on the Al-Jazeera television network showed the bodies of people, including those of women and children, without any conspicuous trauma. The TV network reported some of the victims showed symptoms typical of a nerve gas attack, including seizures and foaming at the mouth.
If the alleged scale of fatalities is verified, it would constitute the largest in a string of attacks in which the Syrian military is alleged to have used chemical weapons.
The Syrian military denied the claim in a statement aired by state-run television.