The step was taken under sub-sections (1) and (3) of section 3 of the Unlawful Activities (Prevention) Act, 1967 (37 of 1967) with immediate effect.

"The LTTE's continued violent and disruptive activities are prejudicial to the integrity and sovereignty of India; and it continues to adopt a strong anti-India posture as also continues to pose a grave threat to the security of Indian nationals," the notification said.