The half brother of North Korea's ruler Kim Jong-un was 'poisoned by needles' in Kuala Lumpur airport.
Four people, two women and two men, have been arrested in connection with the murder, and Malaysian authorities say they are looking for additional suspects.
Malaysian authorities have said that they are looking for a further four North Korean suspects who left the country on the same day that Kim Jong-nam died after being attacked.
The half-brother of North Korean leader Kim Jong-un was killed in an apparent assassination at Kuala Lumpur airport on Monday.
Malaysia's deputy national police chief Noor Rashid Ibrahim named the four new suspects at a news conference on Sunday, and also identified a fifth person of interest.
He also showed press photos of a further two North Koreans who were not named, but are also wanted by the government in connection with the apparent assassination.
Four people have been arrested so far, including two women, the boyfriend of one of them, and a North Korean man.
A North Korean man has been arrested in connection with the death of Kim Jong-un's half brother, as a second autopsy is carried out.
Police in Malaysia say a third person has been arrested in connection with the death of the half brother of North Korean leader Kim Jong-un.
Malaysian police have detained a second woman over the assassination of Kim Jong-nam, the half-brother of North Korean leader Kim Jong-un.