According to the official, the accused was closely associated with former Shiv Sena corporator Shrikant Pangarkar, who was arrested in the case last month.
The ATS has so far arrested seven persons in connection with the case.
On August 10, the ATS had arrested Vaibhav Raut (40), who ran the 'Hindu Govansh Raksha Samiti'-- a little-known cow protection outfit-- at Nallasopara in Palghar district following the seizure of 20 crude bombs and other explosive material.
After Raut, the ATS had arrested Sharad Kalaskar (25), Sudhanva Gondhalekar (39), Shrikant Pangarkar and Avinash Pawar following seizure of explosive materials and arms from various places in the state.
Last Saturday, the anti-terror agency arrested Vasudev Suryawanshi (29) and Vijay alias Bhaiyya Lodhi (32) from Sakri in Jalgaon district of North Maharashtra.
Some of the accused were allegedly linked to radical Hindu groups, ATS had said.
Among other things, they were planning to target a western music festival in Pune, it had said.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)