Noted cricket columnist Peter Roebuck's suicide continued to be shrouded in mystery with South African police refusing to disclose anything even as media reports said he may have taken the extreme step after complaint of a sexual nature had been made against him by a Facebook friend.

The 55-year-old commentator plunged to death from his sixth floor room in the Southern Sun Hotel but Western Cape provincial police spokesperson Frederick van Wyk refused to say whether reports that he was being questioned on sexual assault charges were true.

Van Wyk refused to comment on reports that Roebuck had appeared "disturbed" and had been questioned by police on Saturday.

A report in the 'Herald Sun', quoting a South African website, claimed that Roebuck allegedly wanted to have sex with a Facebook friend against his will.

"It is alleged Roebuck, 55, met a man, 26, at the hotel with plans to discuss a possible university sponsorship.

"Roebuck is alleged to have tried to seduce the Facebook friend and have sex with him against his will, The New Age website said," the Herald Sun reported today.

According to reports in South Africa, Roebuck was being investigated over allegations of indecently assaulting a young man.

Police had told Roebuck that a complaint of a sexual nature had been made against him by a friend he met on Facebook, the reports said.

The newspaper also reported that "Police sources said Roebuck was either going to be formally questioned in the Southern Sun Newlands Hotel on Saturday night, or arrested and taken to a station for questioning over the allegations."