Mohammed bin Salman has been named prime minister of Saudi Arabia in a move that experts said would probably shield the crown prince from a potentially damaging lawsuit in the US in connection to his alleged role in the murder of the journalist Jamal Khashoggi.

Saudi Arabia announced on Tuesday that King Salman was making an exception to Saudi law and naming his son as prime minister, formally ceding the dual title of king and prime minister he had personally held until now.

The development is not likely to change the balance of power in Saudi Arabia, where the 37-year-old prince is already seen as the de facto ruler of the kingdom and heir to the throne.

The Biden administration had been asked by a US judge to weigh in on whether Prince Mohammed ought to be protected by sovereign immunity in a case brought by the fiancee of Khashoggi, Hatice Cengiz.

The decision to name Prince Mohammed as prime minister would also likely assuage any lingering concerns in Saudi Arabia that the crown prince could be arrested or otherwise face legal challenges while traveling abroad.

Khashoggi, a former Saudi insider who had fled the kingdom and was a resident of Virginia in the south-east US, was a vocal critic of the crown prince and was actively seeking to counter Saudi online propaganda at the time when he was killed.

The British prime minister had a phone call with Prince Mohammed this week in which her office said she thanked him for helping to get five British detainees released by Russian-backed forces