New Delhi, Aug 25 - Revolutionary Socialist Party (RSP) leader Abani Roy has tendered his resignation over his party's reported comments on a letter he wrote to Prime Minister Manmohan Singh over the Bharti-MTN deal.

In his resignation letter obtained by IANS, Roy said he has resigned from the primary membership of the party as its leaders had passed adverse comments in the media even without knowing the contents of the letter.

'Instead of announcing through the national daily...the party comrades should have seen the letter first from me and could have taken follow-up action, if any, including disciplinary action against me,' Roy said in his resignation to the party general secretary dated July 15.

A senior RSP leader in Bengal told the Indian Express newspaper July 13 that Roy's letter to the prime minister - titled Bharti-MTN deal severe threat to national security - 'has tarnished the image of the party.'