"Residents of parts of the Russian capital Moscow have been urged by the emergencies ministry to stay indoors because of a noxious gas that is spreading through the city.
The source of the gas is unclear - no accidents have been reported at any of Moscow's chemical factories.
Media reports said that the gas was hydrogen sulphide, which can be highly toxic and smells like rotten eggs."
BBC News had the story November 10, 2014.
SEE ALSO:
"Muscovites Warned to Stay Inside as Toxic Chemicals Engulf City" (Moscow Times)
Source: BBC News, 11/11/2014
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