Two Aum Shinrikyo followers were sentenced to death Monday for releasing the nerve gas sarin on the Tokyo subway system in March 1995 and for illegally manufacturing firearms.

The Tokyo District Court found Toru Toyoda, 32, and Kenichi Hirose, 36, guilty of releasing sarin on subway trains in the nerve gas attack, which killed 12 people and injured more than 5,500.

With Monday's ruling on Toyoda and Hirose, four of the five Aum Shinrikyo members accused of releasing sarin on the subway trains have been sentenced to death.