Chennai Police have arrested three persons in connection with last week's blast near the BJP office in Bangalore that left 16 persons injured.
The third person was arrested from Madurai, they said, adding the trio facilitated the blast while the main culprits were still at large.
Four men were recently detained in Kerala for their alleged involvement in the case.
The arrested are being taken to Bangalore for further investigation, sources said.
The Karnataka government had announced a reward of Rs five lakh to those who provide information on the culprits responsible for the April 17 blast.u00a0
