BIYSK, Russia, Feb. 23 (UPI) -- At least three people died Sunday after an explosion at a mall in Siberia's Altai Republic, police said.
The explosion took place at the Kalinka mall in central Biysk and killed three female shop assistants, RIA Novosti reported.
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Authorities were investigating the cause of the explosion.
Police said it could have been caused by a gas leak, though the building is heated by coal.