More than 20 people have been injured in an accident at a coal-fired power plant in the Russian republic of Tuva in Siberia. “At the moment, we have identified 21 injured,” a spokesman for the regional government told the Interfax news agency on Wednesday. The governor of Tuva, Vladislav Khovalyg, has declared a state of emergency in the region due to the accident. There are no fatalities or missing people, Khovalyg said, but several people have been seriously injured and taken to hospital by plane. In the town of Shagonar, which has a population of 12,000, the heat supply was switched off due…