Nishant Agrawal was nabbed in a joint operation by the Uttar Pradesh and Maharashtra Anti-Terrorism Squads (ATS) at BrahMos' Wardha Road facility, an ATS official said.
The two -- Amit Raghavendra Baddi and Ganesh Miski -- both residents of Hubballi, were arrested on Sunday, special investigating officer M N Anucheth said.
"No one questioned the Congress government's failure. Instead, they are asking why is Prime Minister (Narendra) Modi silent and not speaking on Gauri Lankesh's death. Many wanted PM Modi to react after Gauri Lankesh's death. Why should Modi react if some dog dies in Karnataka?"