Inspector-general of police Khalid Abu Bakar has urged the public not to trust media reports regarding an alleged probe by the United States Federal Bureau of Investigation (FBI) on Prime Minister Najib Abdul Razak and 1MDB.

"We would like to advise all those seeking information to direct all enquiries to the FBI office in Washington and not rely on media news," he said in a statement today.

He was commenting on a Wall Street Journal report that the FBI had opened investigations into Najib and 1MDB.

According to Khalid, the Malaysian police have not been informed of any probe by the bureau.

"Nor have they tendered any official request for assistance in regards to said issue," he added.

The WSJ reported on Sept 20 that the FBI was probing allegations of money laundering involving 1MDB.

The bureau is also said to be involved in an investigation of Najib's assets by the Justice Department's Kleptocracy Asset Recovery Initiative.

The FBI was reportly scheduled to meet former Batu Kawan Umno deputy chief Khairuddin Abu Hassan on Sept 21.

However Khairuddin was arrested three days before the meeting, and is now detained under the Security Offences (Special Measures) Act (Sosma).

Khairuddin is accused of trying to sabotage the country over his multiple police reports on 1MDB overseas.