KUALA LUMPUR, Malaysia (AP) -- A Malaysian court dropped three money laundering charges against jailed former Prime Minister Najib Razak on Friday, in a case linked to the multibillion-dollar looting of a state fund.

Najib was previously convicted in a graft case tied to the 1Malaysia Development Berhad state fund, or 1MBD, and began serving time in 2022, after losing his final appeal. He also faces other graft trials.

The High Court's decision to drop the charges alleging Najib received 27 million ringgit ($6.3 million) in illegal proceeds to his bank accounts came after procedural delays by the prosecution, which saw the case dragging on for six years, Najib's lawyer Muhammad Shafee Abdullah said. Prosecutors could not give the court a timeline for when they will be ready for the trial, he added.

Prosecutors reserve the right to revive charges against Najib and a discharge does not mean an acquittal, Shafee said. But, Najib was happy and can now focus on the main 1MDB trial, he added.

Najib set up 1MDB shortly after taking power in 2009. Investigators allege that more than $4.5 billion was stolen from the fund and laundered by his associates to finance Hollywood films and extravagant purchases. The scandal upended Najib's government and he was defeated in the 2018 election.

Last November, the High Court also discharged Najib and the former treasury chief in another 1MDB-linked corruption case after repeated delays by the prosecution. The pair can still be charged for the same offence in the future. In 2023, Najib was acquitted on separate charges of tampering with a government audit into 1MDB.

Najib was sentenced to 12 years in jail in his first graft trial but the sentence was halved by the Pardon Boards in 2024. Najib alleged the board had issued a home arrest order for him to complete his sentence at home, but the case is still being heard in court.

Najib awaits his verdict in another key case that ties him directly to the 1MDB scandal, which has prompted investigations in the U.S. and several other countries.

The defense in May closed their case on four charges of abuse of power to obtain over $700 million from 1MDB that went into Najib's bank accounts, and 21 counts of money laundering involving the same amount. Closing arguments are scheduled in October, after which the court will set a date for verdict.