Arrests of the former LTTE leaders were made following investigations into suicide vests recovered in the Northern Province, Secretary to the Ministry of Defence Eng. Karunasena Hettiarachchi has said.
Speaking to the BBC Sandeshaya he said the Terrorism Investigation Division carried out the arrests.
Ram, who was a former LTTE leader and Nagulan who was working for him were arrested recently.
However, he reassured that Sri Lanka is not under threats.