A small propeller-powered plane crashed during a training flight at an airfield in the Moscow region, killing the two pilots on board, authoritiessaid Monday.The Aviatik Alliance Aleks-251 twin-engine aircraftcrashed near the Vatulino airfield in the town of Ruza, around 80 kilometers (50 miles) west of Moscow.The transportation arm of Russias Investigative Committee, which probes major crimes, said itlaunched a criminal probe into flight safety violations.Moscows transportation prosecutors office told the state-run news agency TASS that a senior official wasdispatched to identify the causes and circumstances of the plane crash.