The British law chief who brought a war crimes case against Israel’s prime minister is accused of sexually assaulting a female colleague.

Karim Khan, 54, allegedly groped the woman in his office and allegedly got into her hotel bed and began “sexually touching” her.

The allegations come after The Mail on Sunday revealed last week that Mr Khan, the chief prosecutor of the International Criminal Court (ICC), faced internal scrutiny there in May over claims he had harassed the woman.

The complaint was made shortly before Mr Khan called for the arrest of Israeli Prime Minister Benjamin Netanyahu for alleged war crimes in Gaza.

Father-of-two Mr Khan continued to deny the harassment allegations as new claims emerged.

Karim Khan, 54, (pictured) allegedly groped the woman in his office and allegedly got into her hotel bed and began “sexually touching” her

He also knocked on her hotel room door for ten minutes while they were away on another business trip – and on another occasion Mr Khan allegedly locked his office door before reaching into the woman’s pocket .

Mr Khan’s wife, Shyamala Alagendra, was also accused of intimidating a whistleblower who first reported the harassment claim against her husband.

The senior male member of staff claims, in a document seen by the Ministry of Health, that he “threatened” to spread false rumors about him.

Human rights lawyer Ms Alagendra last night said the allegations were “untrue”.

The Associated Press reported that Mr. Khan offered the woman a raise in her promotion. Their time together is said to have escalated after a dinner in London, where he took her hand and is said to have complained about his marriage.

Benjamin Netanyahu, Prime Minister of Israel speaks during a joint press conference with Italian Prime Minister Giorgia Meloni on March 10 last year

She became a regular presence on official trips. In one, Mr Khan allegedly asked the woman to rest with him on a hotel bed, complaining of a headache, and then allegedly “sexually touched” her without her consent.

He later allegedly came to her room at 3am and knocked on the door for ten minutes.

Mr Khan said there was “no truth” to the allegations and that in his 30 years of work he had always stood by victims of sexual harassment and abuse.

The ICC said the woman had not made any formal complaint. But he apparently does not trust the court’s watchdog, the Internal Oversight Mechanism, to properly investigate.

She would have called for an investigation by the body of member states that oversees the ICC, called the Assembly of States Parties to the Rome Statute. The ICC said this request is under review.