A training plane crashed west of the Iranian capital Tehran on Saturday, killing two people on board, state radio reported. "A training plane crashed in Karaj at 8 a.m. (09:30 GMT) and the two people on board were killed," the radio said, adding the cause of the crash was not yet clear. Iran suffers from a poor air safety record, with a string of crashes in the past few decades -- many involving Russian-made planes. On July 15, a Russian-built Tupolev aircraft crashed in Iran on its way to Armenia, after catching fire mid-air and ploughing into farmland killing all 168 people on board. That accident, in which six Armenians and two Georgians were killed, was the worst plane crash in Iran in six years. Another passenger plane crashed in the northeastern city of Mashhad on July 25, killing 16 people, including 13 crew members.