Russia is Claiming Syria Rebels Used Chemical Weapons
White House has denied that the weapons were used
Russian Foreign Ministry has said that Syrian rebels used chemical weapons, killing 16 people and injuring 100 others.
The ministry said Tuesday's attack represented an "extremely dangerous" development in the two-year Syrian crisis.
It said the rebels detonated a munition containing an unidentified chemical agent in the province of Aleppo. It did not give further details.
