At least 78 people have become ill in a gas attack on a store in St Petersburg, Russia. Dozens of people, suffering breathing difficulties and sickness, have been taken to hospital. The Emergency Situations Ministry said the shop, belonging to the Maksidom chain, was among four stores targeted. The mystery gas was released in one of the four stores, the Federal Security Service said. Employees in the three other stores found boxes with wires and timers, but had managed to dispose of them. The stores specialise in home goods. More to follow...