DAMASCUS, Syria Anti-regime activists in Syria say members of a U.N. team of chemical weapons experts were working today in a large Damascus suburb that was affected by last week's alleged chemical attack.
The activists say the experts crossed into rebel-held territory, and were accompanied by members of the Free Syrian Army, the main armed opposition group.
Today's visit was the second by the U.N. inspectors to areas that were said to have been targeted by the attack.
The visit comes as the U.N.'s envoy to Syria says evidence suggests that some kind of "substance" was used in the attack. According to the group Doctors Without Borders, 355 people were killed.
Syria, which has one of the world's largest stockpiles of chemical weapons, is denying the charges that it carried out a chemical attack.
Still, the U.S. and its allies appear to be moving toward a strike on the Assad regime.