A former LTTE cadre was arrested in Kilinochchi by the Terrorism Investigation Department (TID) last week.
Karalasingam Kulenthiran, from Thiruvaiyaru, Kilinochchi was reported missing by his family members on the 13th January.
Relatives found out the following day that he had been arrested by the TID and was being held in Vavuniya.
Mr Kulenthiran was working in an insurance company, having been through the Sri Lankan government's rehabilitation programme.
His is the second reported arrest of a former cadre by the TID in 2017.