A lawmaker from UK's Labour party claims that he has seen documents that suggest then Prime Minister Margaret Thatcher's administration helped Indira Gandhi plan Operation Bluestar, in which security forces entered the Golden Temple to flush out militants in 1984.
Tom Watson, MP for West Bromwich East, told the BBC Asian network channel, that he had seen "top secret papers from Mrs Thatcher authorising SAS (Special Air Services) to collude with the Indian government".
He said the government appears to have "held back" some documents and must disclose more information. "This trying to hide what we did...not coming clean...would be a very great error," he said.
"I am writing to the foreign secretary about this matter and will raise it in the House of Commons. I expect a full explanation," the MP said on his website.
Less than five months after Operation Bluestar, Gandhi was assassinated by her Sikh bodyguards.