Russian emergency workers have flown to Omsk, a Siberian region about 2,250 kilometers east of Moscow, where smelly and multicolored snow fell earlier this week covering more than 100 square kilometers in at least three provinces, officials at the the Emergency Situations Ministry said on Friday. Russian television said similar snow also fell in the adjacent regions of Tyumen and Tomsk, west and northeast of Omsk respectively. Local officials said initial tests showed the snow having high levels of iron, but did not appear to be toxic.