There was a media frenzy at KLIA2 late tonight over speculation on the arrival of Kim Jong-nam's son, Kim Han-sol, on a flight from Macau.

Jong-nam, who is the half-brother of North Korean leader Kim Jong-un, was allegedly murdered at KLIA2 on Feb 13.

Han-sol, 21, was speculated to arrive in Malaysia via an AirAsia flight at 7.33pm.

About 70 media personnel parked themselves at the arrival gates, but it could not be confirmed if any of the passengers were indeed Han-sol.

Some zeroed in on a man who was wearing a face mask, a normal practice for those who have a cold, but the masked man did not speak to media to confirm his identity.

There were still several media personnel still waiting at about 11pm, despite earlier speculation that he was to arrive at 7.50pm.

It is understood that Han-sol will be in Malaysia to provide a DNA sample to authorities to confirm the identity of his father.

Police said Malaysia will not release the body until it can confirm it is Jong-nam.

The authorities are giving the deceased's family two weeks to do so.

However, Deputy Prime Minister Ahmad Zahid Hamidi last week said the deceased was indeed Jong-nam and that he carried valid passports with two different names - Kim Jong-nam and Kim Chol.

Pyongyang said it doubts the integrity of the Malaysian investigation and claimed Malaysian police had threatened a suspect's family at gunpoint.

Police have arrested two women holding a Vietnamese and Indonesian passport respectively, and are looking for four North Korean men who are believed to have fled the country.