Russia probes smelly orange snow (BBC)

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Russia has flown a team of chemical experts to a Siberian region to find out why smelly, coloured snow has been falling over several towns

Feb. 2, 2007 -- (BBC) -- Oily yellow and orange snowflakes fell over an area of more than 1,500sq km (570sq miles) in the Omsk region Wednesday, Russian officials said.

{mosimage} Chemical tests were under way to determine the cause, they said.

Residents have been advised not to use the snow for household tasks or let animals graze on it.

"So far we cannot explain the snow, which is oily to the touch and has a pronounced rotten smell," said Omsk environmental prosecutor Anton German, quoted by the Russian news agency Itar-Tass on Thursday.

Vladimir Gurzhey, an official with the civil defence ministry in Omsk, told the Russia TV channel that the snow had four times the normal levels of iron in it.