In October 2013, a series of blasts hit Patna's Gandhi Maidan, hours before BJP's then prime ministerial candidate Narendra Modi was to address a rally.
The blasts killed six people and injured over 89.
In July 2013, the Mahabodhi temple in Bodhgaya was rocked by 10 blasts soon after morning prayers. A total of 13 bombs were planted, out of which 10 exploded, investigators have said. Three bombs were found and defused.
Both terror cases were transferred to the NIA for investigation. The NIA had arrested 11 accused in the Patna case and six in the Bodhgaya case.