At least 64 people have died in a fire that engulfed a shopping and entertainment complex in the Siberian coal-mining city of Kemerovo.Many of the victims are children. Ten people are still listed as missing. The blaze started on an upper floor of the Winter Cherry complex during school holidays. The mall’s shops, cinema and bowling alley were packed at the time. Video posted on social media showed people jumping from windows to escape the flames. “According to preliminary information, the roof collapsed in two cinemas,” Russia’s Investigative Committee said in a statement. The cause of the fire is not yet known. The authorities have launched an investigation. Four people have been detained for questioning, including the head of the company that manages the shopping centre, according to the Investigative Committee. The owner of the Winter Cherry complex is among those being held.