(Reuters) -A Russian fighter plane crashed into a residential building in the Siberian city of Irkutsk on Sunday and the two pilots were killed, officials said. In a post on Telegram, Irkutsk governor Igor Kobzev said the plane crashed into a two-storey house in the city. The emergencies ministry said the pilots died, but there were no other casualties. It was the second such incident in six days. Last Monday, a Sukhoi Su-34 fighter plane crashed into an apartment block in the southern city of Yeysk, near Ukraine, and at least 15 people were killed. Russian news agencies said the plane in Sund…