Prime Minister Manmohan Singh replied to Gujarat Chief Minister Narendra Modi's letter on Sir Creek. "Allegations that Sir Creek will be handed over to Pakistan are untrue," he added.

Modi on Thursday asked Dr Singh to stop dialogue with Pakistan at once on the Sir Creek issue and demanded that it should not be handed over to the neighbouring nation.

"I am writing on a serious issue of talks being held on Sir Creek being handed over to Pakistan. Any attempt to hand over Sir Creek to Pakistan would be a strategic blunder considering the history and sensitivity of the region," Modi has written in a letter to the PM.

"I would earnestly request you to stop this dialogue with Pakistan at once and Sir Creek should not be handed over to Pakistan," Modi further wrote in the letter.

"Due to the election code of conduct, Modi wrote the letter as a concerned citizen and not as a chief minister of a state," BJP spokesperson Nirmala Sitaraman said while giving details of the letter at a press conference in Ahemedabad.