INTERNATIONAL NEWS - The claims, spanning from the mid-1980s to 2016, raise further questions about the US actor's conduct in the decades he worked in Hollywood and as artistic director at London's Old Vic theatre.
The BBC has contacted Mr Spacey for comment.
On Wednesday, the journalist whose October tweet triggered a series of accusations about Mr Spacey spoke out.
Former television news anchor Heather Unruh told a press conference in Boston that her son had been sexually assaulted by Mr Spacey, at the age of 18 in a bar in Nantucket, Massachusetts, in July 2016.
She said Mr Spacey had bought her son alcohol - the drinking age in Massachusetts is 21. After getting him drunk, Mr Spacey had "stuck his hand inside my son's pants and grabbed his genitals", she said.
She said Mr Spacey had invited her son to a party, but he had run away from the bar when Mr Spacey had gone to the lavatory.
A criminal investigation was now under way, Mrs Unruh said.
