Could he escape the gallows?

Malaysian authorities may have a tough time extraditing Sirul Azhar Umar from Australia.

He is believed to be there after leaving Malaysia in October.

Australia does not allow extradition if the person has been sentenced to death.

The only way extradition will be allowed is if Malaysia gives the undertaking that Sirul will not be executed, the Sydney Morning Herald reported.

Kuala Lumpur CID director Datuk Mohmad Salleh had earlier told Bernama that police would liaise with their Australian counterparts and would also seek Interpol's help should Sirul flee Australia.

"We will definitely seek the cooperation of the international police," he had said.

On Tuesday, Malaysia's highest court reinstated the death penalty for Sirul and Azilah Hadri for the murder of Mongolian interpreter Altantuya Shaariibuu in 2006. The pair's initial death sentence had been overthrown by an appeals court in 2013.