Diplomatic ties between Malaysia and North Korea have soured since the murder, which South Korea and U.
A high level North Korean diplomatic delegation arrived in Kuala Lumpur on Tuesday and has held talks with members of the Malaysian cabinet to press those demands.
The move comes two weeks after Kim Jong Nam, the estranged half brother of North Korean leader Kim Jong Un, was killed at the Kuala Lumpur airport with a toxic nerve agent.
Malaysia is considering expelling North Korea's envoy to the Southeast Asian nation or shutting its embassy in Pyongyang, a senior government official told Reuters last week, when the Malaysian ambassador was recalled for consultations.
North Korea and Malaysia have maintained cosy ties since the 1970s when former prime minister Mahathir Mohamad embraced the isolated state, in part to rebuff the United States.
Cars made by Malaysian national carmaker Proton have been sold to North Korea and used as taxis.