KUALA LUMPUR, Dec. 23 -- The High Court has said there are no laws in Malaysia that provide the mechanism for house arrest, and that this means that an order for former prime minister Datuk Seri Najib Razak to serve the rest of his jail term at home cannot be carried out.

In her 41-page written judgment released today, High Court judge Alice Loke Yee Ching said the former Yang di-Pertuan Agong's house arrest order for Najib was not valid, as it did not follow the procedures in the Federal Constitution.

The judge said the High Court therefore cannot direct the Malaysian government to carry out house arrest on Najib as the Agong's order was invalid, but also went on to say there are currently no laws for house arrest.

"In any event, I am...