A Malaysian diplomat facing charges will be arrested at the border as soon as he arrives in the country and taken to the nearest court, police say.

The Malaysian Government last night confirmed Muhammed Rizalman Bin Ismail would be sent back to New Zealand where there is an active warrant for his arrest relating to sexual assault charges.

In a statement released this afternoon, Wellington district police commander Superintendent Sam Hoyle said police were working closely with Crown Law and MFAT on the legal process and logistical details relating to Ismail's return.

"This is a unique and complex legal situation so careful planning is required and no date for his return has been set.


"When someone with a warrant to arrest arrives in New Zealand they are met at the border by police, arrested and taken to the nearest court.

"The court can then remand them in custody, release them at large or release them on bail, with or without conditions. At this time the next hearing date is also set."

Police were continuing to support the victim and had kept her up to date throughout the process, Mr Hoyle said.

Ministry of Foreign Affairs head John Allen offered to resign over his ministry's mishandling of the case, however Foreign Minister Murray McCully declined the offer, but said he was angry about his officials' mistakes, which led to public embarrassment for the minister and Prime Minister John Key.