MOSCOW - A mid-sized Russian-built plane crashed in western Russia on Saturday, killing all six people on board, officials said, and Russian news agencies said two of the dead were citizens of Myanmar. The Antonov An-148, with four crew members and two other people aboard, crashed in the Belgorod province, some 600 km (370 miles) south of Moscow, during a training flight, the Emergency Situations Ministry in Moscow said. State-run Itar-Tass cited provincial emergency officials as saying two of the dead were Myanmar citizens who were pilots by profession.