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Russia says informed US of toxic substance attack by rebels in Syria's Aleppo

The Russian military informed the United States that rebels in the Syrian city of Aleppo launched an attack using toxic substances at 19:05 on August 02, Interfax news agency reported on Wednesday, citing a Russian general.

Rescuers say toxic gas dropped on Syrian town where Russian helicopter shot down

A Syrian rescue service operating in the rebel-held territory said on Tuesday a helicopter dropped containers of toxic gas overnight on a town close to where a Russian military helicopter was shot down hours earlier.

GRISLY VIDEO: Russian helicopter shot down in rebel-held Syria

GRISLY VIDEO: Russian helicopter shot down in rebel-held Syria

The helicopter came down near the town of Saraqeb, in Idlib province, roughly midway between Aleppo and the Russian Air Force base at Khmeimim, near the Mediterranean coast.

Russian helicopters spotted at Syria airfield: US officials

 The United States has identified a small number of Russian helicopters at a Syrian airfield, U.S. officials said on Wednesday, the latest addition to what Washington believes is a significant Russian military buildup in the country.