The evidence was shown in a report by Shane O’Sullivan, broadcast on BBC Newsnight.
It reveals that the operatives and four unidentified associates were at the Ambassador Hotel, Los Angeles in the moments before and after the shooting on 5 June, 1968.
The CIA had no domestic jurisdiction and some of the officers were based in South-East Asia at the time, with no reason to be in Los Angeles.
Kennedy had just won the California Democratic primary on an anti-War ticket and was set to challenge Nixon for the White House when he was shot in a kitchen pantry.
A 24-year-old Palestinian, Sirhan Sirhan, was arrested as the lone assassin and notebooks at his house seemed to incriminate him.
However, even under hypnosis, he has never been able to remember the shooting and defence psychiatrists concluded he was in a trance at the time. (Read more from news.bbc.co.uk)