The group was a predecessor to the Liberation Tigers of Tamil Eelam (LTTE).
Initially, the TNT carried out several small-scale attacks, including the bombing of a carnival at the Duraiappa Stadium in 1972, and several explosions during Prime Minister Sirimavo Bandaranaike's visit to Jaffna in 1974.
The group gained notoriety in 1975 when Prabhakaran and three other members assassinated Alfred Duraiappah, the Mayor of Jaffna.
[2] The group continued to carry out attacks and a string of bank robberies after the assassination, and the Sri Lanka Police were issued orders to arrest all members of the group.
Wanting to form a guerrilla group, Prabhakaran created the Liberation Tigers of Tamil Eelam on 5 May 1976 and disbanded the Tamil New Tigers.