A military training plane crashed into a reservoir Tuesday during an exercise, and both the instructor and pilot were killed, the air force reported. The B-34 trainer crashed into the Tsengwen reservoir in Tainan, southern Taiwan, at about 11:30 a.m., the air force said in a brief statement. An air force official said an instructor and the pilot were the only people on board. Tainan is 185 miles south of Taipei. The cause of the accident was being investigated.