Washington: US President Donald Trump said on Saturday that, subject to receipt of further information, he planned to allow the opening of long-secret files on the November 1963 assassination of President John F. Kennedy that are scheduled for release next week.

Politico magazine earlier quoted Trump administration and other US government officials as saying the president would almost certainly block the release of information from some of the thousands of classified files, which the US National Archives is due to make public by an October 26 deadline.

John F Kennedy was killed on November 22, 1963. Credit:AP

"Subject to the receipt of further information, I will be allowing, as President, the long blocked and classified JFK FILES to be opened," Trump said in a tweet.

The November 22 1963 assassination cut short "Camelot," as the 1000 days of the Kennedy presidency became known. Kennedy was 46 when he died and remains one of the most admired US presidents.