"Toxic leak" causes massive cloud covering parts of Moscow [1]

Authorities have urged residents of Moscow to stay indoors with their windows closed, after a smelly noxious fog was reportedly spreading through the parts of the city on Monday, November 10, 2014.

The smell has been detected in the south, east, and south-eastern parts of the Russian capital. According to some sources, about 4600 square kilometers (1892 sq. miles) wide area was covered judging by the huge response from the people reporting it from Zelenograd to Podolsk. The polluting cloud drifted from the south-east towards the center of Moscow.

According to Russian Hydro-Meteorological Service, the cloud first appeared in Moscow's south-east Lublino region early on November 10, where the concentration of hydrogen sulfide (H₂S) has exceeded six times of normal levels.