Three children and a woman died in a fire on Sunday at a shopping centre in the Siberian city of Kemerovo, Sputnik News reported, quoting Russia’s Investigative Committee. Twenty-six people were injured.

The cause of the fire was not immediately clear. The people who died were in the children’s playroom when the fire erupted, the committee said. Rescue and firefighting operations are under way, with 60 firemen at the site.

The fire reportedly started on the fourth floor of the Winter Cherry building.

Firemen rescued 10 people, while 50 people managed to escape, according to Tass news agency.

The Investigative Committee has launched a probe into the fire.