Bombing of the Jedi Temple Hangar

Around 20 BBY, a hangar within the Jedi Temple was subject to a bombing which saw the deaths of Jedi and clone soldiers and maintenance crew alike. It was suspected that Jakar Bowmani, a worker at the temple was responsible, until it was discovered that Letta Turmond, who fed Nano-droids to her husband, was responsible for the explosion. She later told Ashoka Tano, shortly after the former's arrest, that the one who planned the explosion was actually a disgruntled member of the Jedi Order, although she was killed via a Force-choke before she could divulge the Jedi's identity, also leading to Tano's being framed for her death.

The reason for the bombing was attributed to the the growing mistrust of the population of the Republic for the Jedi Order.