At least four people were killed after the partial collapse of a residential building in Izhevsk on Thursday, said the Deputy Director of the National Guard in the region, Nikolay Merzlyakov. Two more people have reportedly been hospitalised while several remain trapped under the debris. Footage captured emergency service workers operating at the site of the deadly incident. A investigation is... Еще underway, with a gas explosion seen as the most likely cause. A total of 411 emergency service workers and 111 pieces of equipment are involved in the response, many of them from Russia's Ministry of Emergency Situations.