Indonesian police said Thursday they will not interfere in the investigation of a woman holding an Indonesian passport over the killing of Kim Jong-nam, elder half-brother of North Korean leader Kim Jong-un, in Malaysia on Monday.

Indonesian Police Public Relations Division chief Boy Rafli Amar said Indonesia respected the legal process in Malaysia and left it to the Malaysian authorities to conduct their investigation.

It has been confirmed that one of two women arrested over the killing was an Indonesian woman who went by the name of Siti Aishah. The other woman was the holder of a Vietnamese passport.

"In the legal aspect, so long as there is no request for assistance, we respect the process of law against our citizens in other countries," he was quoted by online media as saying to reporters Thursday.

Jong-nam was reportedly at klia2 at 8am on Monday to catch a flight to Macau an hour later when a woman suddenly covered his face with a cloth laced with poison.

He died en route to the hospital in Putrajaya.

-- BERNAMA