The controversial Wimbledon player, who has a history of disciplinary problems, is alleged to have bitten the nose of a Daily Mirror news reporter, Ted Oliver, in a bar in Jury's hotel, a few hundred yards from the Lansdowne Road ground.
Mike Parry, the FA's press officer, saw the alleged attack. "I did witness an incident between Vinnie Jones and Ted Oliver. I have compiled a report which I have sent to my colleagues and senior executives of the FA at Lancaster Gate."
Jones, who recently made his international debut for Wales, received a six month ban - suspended for three years - in February 1993 for his part in the notorious video Soccer's Hard Men.
He is also facing a charge from the FA of bringing the game into disrepute after allegedly swearing at the Newcastle United manager, Kevin Keegan, following Wimbledon's recent 2-1 defeat at St James's Park.