Tony Buzbee, a lawyer from Houston representing the claimants, said he expected lawsuits to be filed within the next month.

He said there were 60 male and 60 female accusers, and that 25 of them were children at the time of the alleged offences.

The allegations against Combs cover a period from 1991 to this year.

"This type of sexual assault, sexual abuse, sexual exploitation should never happen in the United States or anywhere else," Mr Buzbee said at a news conference.

"This should have never been allowed to go on for so long. This conduct has created a mass of individuals who are injured, scared and scarred."

Most of the lawsuits are expected to be filed in New York and Los Angeles, Mr Buzbee said. Further to the 120 accusers, other cases are still being reviewed, he added.

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'Reckless media circus' - lawyer

Combs - also known as P Diddy and Puff Daddy - is awaiting trial on sex trafficking charges.

In response to the latest claims, his lawyer said he "cannot address every meritless allegation in what has become a reckless media circus".

"That said, Mr Combs emphatically and categorically denies as false and defamatory any claim that he sexually abused anyone, including minors," Erica Wolff added in a statement.

"He looks forward to proving his innocence and vindicating himself in court if and when claims are filed and served, where the truth will be established based on evidence, not speculation."

The majority of the individuals represented by Mr Buzbee's firm are from California, New York, Georgia and Florida, with accusers from more than 25 states in total.

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Apology for 'inexcusable' behaviour

Combs faces multiple other lawsuits filed in the last year, and the latest claims also follow a video that emerged in May showing him attacking his ex-girlfriend, Cassie.

He apologised at the time for what he called his "inexcusable" behaviour in the video, saying he was "disgusted" by what he did.

Combs has been imprisoned at the Metropolitan Detention Centre in Brooklyn, New York, since he pleaded not guilty on 17 September to charges that he used his "power and prestige" to induce women into drugged-up sexual performances with male sex workers. These were allegedly dubbed "Freak Offs".

Vow to clear his name

He has also pleaded not guilty to racketeering conspiracy and sex trafficking and vowed to fight to clear his name.

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Combs's lawyers offered a $50m (£37.8m) bail package in exchange for him to be placed under house arrest at his Florida mansion with GPS monitoring and strict limits on visitors. So far though, his legal team's applications for bail have been denied.

Combs, who has won three Grammys, founded Bad Boy Records in 1993 and is one of the best-known music executives and performers in hip-hop.