Police today released photographs of three suspects in the July 19 murder, including that of Bilal Malik and Fakruddin alias 'police Fakruddin' (both from Madurai).
The other suspect has been identified as one Panna Ismail alias Ismail of Melapalayam in Tirunelveli.
However, an official police release said the trio are wanted in many criminal cases in Tamil Nadu. Any information given about their whereabouts by the public would be kept highly confidential, it said.
Ramesh (52) was hacked to death while he was returning home after visiting the BJP office on Friday night in Salem. His murder sparked an outrage in the party which gave a call for a state-wide bandh on July 22.
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Tamil Nadu Chief Minister Jayalalithaa today constituted a Special Investigation Team under the Director General of Police (CB-CID) to probe the case.
Jayalalithaa, expressing shock over the murder, said crimes, irrespective of whether they are politically motivated or otherwise, have no place in civilised society and should be rooted out by stern and strong measures
DMK chief M Karunanidhi extended his condolences to the family members of Ramesh and alleged that political murders have been increasing in the state.
CPI(M) state president G Ramakrishnan demanded action to ensure ensure such incidents do not recur in future.
MDMK leader Vaiko said he knew Ramesh well and recalled there had been a bomb attack on him about six years back. His house was also attacked in 2011, he said.
Congress had yesterday condoled the incident.