Former DMK minister KPP Samy was on Saturday arrested in Chennai in connection with a case relating to the abduction and murder of two fishermen in 2006.
Samy was taken into custody from his residence at Tiruvottiyur, police said.
The former minister had come under the scanner following suspicion that the two fishermen were abducted and murdered. Special teams were formed to investigate the case.
The two fishermen, said to be AIADMK supporters, were reported missing in September 2006. The family of the missing persons had complained that they suspected the involvement of Samy and his family members, police sources said.
Samy, fisheries minister during the DMK regime, was denied bail and two of his brothers surrendered to the police.
Samy is the fifth DMK minister to be arrested since the AIADMK robbed the party off power in Tamil Nadu elections in 2011.
Former state higher education minister K Ponmudi, former transport minister KBN Nehru, former agriculture minister Veerapandi Arumugam and former handlooms minister NKKP Raja are already in jail in connection with various land grabbing cases.
DMK MLA A Soundarapandian was too arrested this year in connection with an alleged land grabbing case.
Chief minister J Jayalalithaa after coming to power set up special anti-land grab cells to restore usurped land to rightful owners. More than 8,000 people have so far lodged complaints with the cells so far.
(With PTI inputs)