When contacted, a Sahara group spokesperson confirmed that a "last-minute deal" has been negotiated with the Reuben brothers and the talks are in final stages now, but did not comment on the deal size.
A report in the Sunday Times, however, pegged the debt refinance deal at USD 850 million (Rs 5,500 crore).
The Grosvenor House hotel was put on sale by its lender Bank of China earlier this year after a 'technical default'.
When contacted, a Sahara group spokesperson said in a statement that the group has "successfully managed to avert the enforced sale of the Grosvenor House Hotel in London, one of the best-known iconic hotels in the world.
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"A team led by Group Chairman has successfully negotiated a last-minute deal with the Reuben Brothers, who are now in the final stage of taking over the loan portfolio from the Bank of China. The other properties owned by the group are the New York Plaza hotel and the New York Dream hotel."
"The negotiations that are already underway are expected to generate new money for meeting the Group's immediate requirements in the Supreme Court of India.
"It is a matter of great satisfaction to our Chairman, Subrata Roy Sahara, that the Indian flag will continue to fly on these three globally-renowned hotels," it added.
It, however, refused to share any further information "at this time, on legal advice, to protect the on-going negotiations."
The Sunday Times report said that "David and Simon Reuben, whose empire stretches from data centres to horse racing, clinched the purchase of two loans against the properties from Bank of China late last week" and they have given a four-month extension to the Sahara Group.
At that time, Sahara Group had said it was still working on a refinancing transaction to repay the loans to Bank of China and regain control of the iconic property.
Sahara had also said that the London hotel was being "treated under default" because Bank of China has declared "an event of default" on the US loans due to some "technical breaches" in the financial covenants.