VLADIVOSTOK, Russia — At least 20 people were killed and six others injured in a fire at a private nursing home in the city of Kemerovo in Russia's Western Siberia region, TASS reported on Saturday.

Two injured people were in critical condition, the report said.

The fire was caused by an improper operation of the stove used for heating, it said, citing law enforcement agencies

The fire was caused by an improper operation of the stove used for heating, it said, citing law enforcement agencies.

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The fire broke out at Friday night in a two-storey wooden building that housed a private nursing home, which law enforcement agencies said was illegal.