A fourth former LTTE cadre was arrested by the Terrorism Investigation Department on Monday.
The former head of the LTTE's Trincomalee intelligence wing Thalaiarasan was taken into custody in relation to the alleged find of a suicide vest in Chavakachcheri in March.
The Island said that 11 Tamils with previous connections to the LTTE had so far been arrested due to the discovery of the vest.
Former LTTE commander, Kanathippillai Sivamoorthy, known as Nagulan, was abducted in Jaffna on Tuesday and was found later in custody. His detention came shortly after the arrest of the LTTE cadre Damotharan Jayakanth by Sri Lanka’s Terrorist Investigation Department (TID) as well as the former LTTE commander, Ram, who was earlier reported as abducted in the Eastern province but found to have been detained by Sri Lanka's Terrorism Investigation Division (TID).