India extended its ban on Sri Lanka's Tamil Tigers because the group continues to pose a threat to New Delhi and is now blaming Indian leaders for its rout last year.
The Liberation Tigers of Tamil Eelam (LTTE) "continues to pose a threat to, and are detrimental to, the sovereignty and territorial integrity of India", according to a gazette notification.
It said that although the LTTE had been decimated by the Sri Lankan military, its cadres are regrouping in Tamil Nadu "in pursuance of their avowed objective of establishing separate Tamil Eelam".
Surviving members of the group view the Indian government as "traitors" for letting them down and the Sri Lankan government as "enemies" and want to take revenge, it said.
"Possibilities of these remnant cadres using India, especially in Tamil Nadu, as a rear base for their regrouping activities thus cannot be ruled out," it said.
The notification said the LTTE leaders, operatives and supporters "have been inimically opposed to" India's Sri Lanka policy.
India first outlawed the LTTE in 1992, a year after it assassinated former prime minister Rajiv Gandhi. The ban has been extended after every two years.
LTTE chief Velupillai Prabhakaran and his top lieutenants were killed May 18 last year.