'India has done an extreme form of treachery to the Tamils,' the spokesman said. 'We need India to do justice to the Tamils.'

In May, India supported a resolution passed by the UN Human Rights Council in Geneva which commended the Sri Lankan government on its defeat of the Tamil Tigers and its efforts to address the needs of the displaced.

The resolution was slammed for ignoring the tactics used by the Sri Lankan army that led to massive human rights violations.

Brazil, Cuba, India and Pakistan blocking a stronger resolution that called for accountability.

The Tamil separatist campaign claimed over thousands of lives since July 1983. The end of the war was followed by accusations of human rights violations against the Sri Lankan authorities.

Human rights groups are also calling for the release of 280,000 displaced Tamil civilians living in relief centres which critics say are no better than 'detention camps'.

TAG said it supports the goal of an 'independent state' for Tamils through peaceful means and diplomacy.

'The violent form of struggle is dead in the new world order,' said its spokesperson, who asked not to be named because of the sensitive nature of the matter.

'We want an economic boycott from the one million strong Tamil Diaspora,' he added. 'The struggle will continue in one form or the other.'