At least 100 people have been killed in an explosion at a nightclub in the centre of the Russian city of Perm near the Ural mountains.
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The agencies quoted law enforcement officials as saying the blast had been caused by firecrackers.
They said the explosion had injured at least 60 people.
A law enforcement officer told Itar-Tass news agency that the explosion tore through the Lame Horse nightclub in the centre of town.
"The blast went off at 23:15 Moscow time (20:15 GMT)," RIA Novosti agency quoted the Emergencies Ministry as saying.
Perm has a population of 1.2 million and is the 6th largest city in Russia, some 1,400km (870 miles) east of Moscow.
/Telegraph.co.uk/