The official said that the three were Indigenous People’s Front of Tripura (IPFT) legislator Dhirendra Debbarma and party leaders Balram Debbarma and Amit Debbarma along with 300-500 IPFT members.
The IPFT is a tribal party and an ally of the ruling Bharatiya Janata Party (BJP). It has eight MLAs in the 60-member Tripura Assembly and two Cabinet ministers in the BJP-led ministry led by Chief Minister Biplab Kumar Deb.
Miscreants allegedly owing allegiance to the IPFT had on September 20, 2017, murdered Bhowmik at Mandwai, 25 km from Agartala. Santanu, 27, was attacked with sharp weapons while covering a road blockade by the IPFT, which is demanding a separate tribal state.
IPFT Vice President Ananta Debbarma told IANS that the party will comment later.
A newspaper journalist, Sudip Dutta, was also shot dead inside the Tripura State Rifles 2nd Battalion headquarters at Ramchandra Nagar in West Tripura district on November 21.
The then Left Front government had set up two SITs to probe the two killings.
The SIT arrested four TSR personnel — including TSR 2nd Battalion Commandant Tapan Debbarma, who is a senior Tripura Police Service (TPS) officer and was waiting for IPS nomination regarding Dutta’s killing.
The trial in the Dutta murder case started last month in the West Tripura District Additional District and Session Judge’s court but it was stopped following orders by the Tripura High Court.
The BJP-led government told the High Court in May that it had referred the matter to the CBI.