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Japanese police seek motive of man who set himself on fire on high-speed bullet train

  • Japanese police search the apartment of the man who set himself on fire on a high-speed bullet train Tuesday on a famed Japanese Shinkansen bullet train, in Tokyo, Wednesday, July 1, 2015.  The man killed himself and another passenger. The shocking incident Tuesday occurred as the super-express train approached Odawara, just west of Tokyo, as it headed to Osaka. (Kyodo News via AP Photo) JAPAN OUT, MANDATORY CREDIT

    Japanese police search the apartment of the man who set himself on fire on a high-speed bullet train Tuesday on a famed Japanese Shinkansen bullet train, in Tokyo, Wednesday, July 1, 2015. The man killed himself and another passenger. The shocking incident Tuesday occurred as the super-express train approached Odawara, just west of Tokyo, as it headed to Osaka. (Kyodo News via AP Photo) JAPAN OUT, MANDATORY CREDIT  (The Associated Press)

  • FILE - In this June 30, 2015 photo, a passenger is carried out of the bullet train, right, which made an emergency stop in Odawara, west of Tokyo. Japanese police have searched the apartment of the man who set himself on fire on the high-speed bullet train, killing himself and another passenger, as officials sought clues to his motive. (Kyodo News via AP Photo) JAPAN OUT, MANDATORY CREDIT

    FILE - In this June 30, 2015 photo, a passenger is carried out of the bullet train, right, which made an emergency stop in Odawara, west of Tokyo. Japanese police have searched the apartment of the man who set himself on fire on the high-speed bullet train, killing himself and another passenger, as officials sought clues to his motive. (Kyodo News via AP Photo) JAPAN OUT, MANDATORY CREDIT  (The Associated Press)

Japanese police have searched the apartment of the man who set himself on fire on a high-speed bullet train, killing himself and another passenger, as officials sought clues to his motive.

Investigators identified the man as 71-year-old Haruo Hayashizaki. He poured an oil-like liquid over himself and set fire to it at the end of a train car on Tuesday, filling the coach with smoke and killing himself. A 52-year-old female passenger died from suffocation after suffering throat burns.

Police said they haven't determined the motive.

Transport officials met with bullet train operators on Wednesday to discuss how they can tighten security without affecting the efficiency of the trains.