At least two people were killed Friday in Moscow in a severe gas-explosion in an high-rise building, which also left a 14-year-old boy with heavy injuries, the news agency Interfax reported citing Russian civil defence according to DPA. According to the report, a woman and a child were killed when the middle of the 20-storey building - including at least four of its 598 flats - was destroyed. Investigators' initial reports state that the cause of the blast was due to the explosion of gas tanks in a flat on the 11th floor of the 19-year-old building located in Moscow's north.