Police in Malaysia on Sunday (19 February) said they were looking for four more North Korean suspects in the murder of Kim Jong-nam, the estranged half-brother of North Korean leader Kim Jong Un.

According to Deputy Inspector-General of Police Tan Sri Noor Rashid Ibrahim, all the four North Korean suspects left Malaysia on the day of the assassination.

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"We can confirm that the four left the country on the same day of the attack. We are cooperating with Interpol and other relevant bodies in the region," he told a news conference.

According to The Star, the four suspects are Rhi Ji Hyon, 33, Hong Song Hac, 34, O Jong Gil, 55 and Ri Jae Nam, 57.

On Friday, a North Korean man by the name of Ri Jong-chol was arrested by Malaysian police in connection with the murder. Two women, one an Indonesian and the other carrying Vietnamese documents have also been arrested along with a Malaysian man.

Inspector-General of Police Tan Sri Khalid Abu Bakar said: "Based on an i-KAD that he has in his possession, the suspect is identified as with date of birth on May 6, 1970, and a citizen of the Democratic People's Republic of North Korea (DPRK),"

The 45-year-old Kim Jong-nam died on Monday after falling ill at Kuala Lumpur International Airport while waiting for a flight to Macau. According to South Korean and US officials, he was killed by North Korean agents.