Matsumoto sarin attack was an attempted assassination perpetrated by members of the Aum Shinrikyo doomsday cult in Matsumoto , in Japan 's Nagano prefecture , on the night of June 27 , 1994 . Eight people were killed and over 500 were harmed by sarin gas that was released from a converted refrigeration truck in the Kaichi Heights area . The attack was perpetrated nine months before the better known Tokyo subway sarin attack
Tokyo subway sarin attack
Tokyo subway sarin attack
Matsumoto sarin attack