The latest JFK files have been released by President Donald Trump, which includes a surprising link to Australia.

Among these documents is a once top-secret exchange between the head of ASIO and top US officials before the assassination.

Veteran journalist, investigative author, and the editor of the JFK Facts blog Jefferson Morley told Peter Fegan on 4BC Breakfast, "What was finally released was simply that the CIA and the Australian services had a close relationship and they were working together, which anybody who knows about US-Australian relations would know that, of course, that was the case."

"But a lot of what we see here is just over-classification, we call it, just withholding information that there's no good reason to withhold it," Mr. Morley said.

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