Ten people have been killed in an explosion at a cafe in the Russian city of Orsk, emergency officials say.
The explosion destroyed the building housing the cafe, located in a market. Orsk is in the Ural mountains near Russia's border with Kazakhstan.
A spokesman for Russia's emergency ministry, Viktor Beltsov, said the cause of the blast was as yet unclear.
Investigators told state-run TV that they suspected arson. Five men and five women died, including the cafe's owner.
According to the AFP news agency, the 10 victims were all found in a corner of the cafe.
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