(Reuters) An exiled Iranian opposition group said on Thursday it had information about what it said was a centre for nuclear weaponisation research in Tehran that the government was moving to avoid detection ahead of negotiations with world powers.
The dissident National Council of Resistance of Iran (NCRI) exposed Iran's uranium enrichment facility at Natanz and a heavy water facility at Arak in 2002. But analysts say it has a chequered track record and a clear political agenda.
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An accusation it made in July about a secret underground nuclear site under construction in Iran draw a cautious international response, with France merely saying it would look into it.