Prosecutors on Wednesday demanded the death sentence for a former senior member of Aum Shinrikyo over his involvement in a series of murders committed by the doomsday cult, including the 1995 sarin gas attack on the Tokyo subway system.

Tomomitsu Niimi, 37, is being tried on charges relating to 11 cases, including seven murder cases and two attempted murder cases that date back to the period between February 1989 and April 1995.

The seven murder cases in question involve a total of 26 deaths.