At least thirteen people have died in a fire at a nightclub in the Russian city of Kostroma, the region's governor said on Saturday, Reuters reports.
Kostroma is about 300 kilometres (190 miles) north-east of Moscow.
"According to preliminary information, 13 people were killed in the fire. The information is being updated," governor Sergey Sitnikov said.
Five people were injured and have received medical assistance, he added.
He said the fire had been extinguished as of 0729 a.m. (0429 GMT).
The prosecutors' office in the region said an investigation had been opened.
TASS news agency reported the fire may have started after a flare gun was used, citing emergency services.
The fire caused the roof of the building to collapse, covering an area of 3,500 square metres, TASS reported.
