A leaflet left near the body identified the victim as a traitor claiming that the LTTE had killed him. Muththu had been with the LTTE before joining the EPDP.
Investigators said that the suspects had carried out the killing after arriving in Trincomalee by boat from South India and were planning to leave secretly when the police apprehended them.
The arrests followed the interrogation of a woman and a close relative of hers in connection with the killing. According to police, among the arrested was the detained woman’s husband identified as Dinesh Kumar.
By Hemantha Randunu and Saman Mallawarachchi