KUALA LUMPUR (THE STAR/ASIA NEWS NETWORK) - Malaysia's Culture and Tourism Minister Mohamed Nazri Abdul Aziz denounced North Korea as a highly unpredictable "rogue" state and discouraged Malaysians from visiting North Korea, amid a diplomatic spat over the Kim Jong Nam murder.

"I don't encourage Malaysians to visit North Korea. You cannot predict what they will do," Nazri said after attending the launch of the 15th National Craft Day here Thursday.

North Korea has also demanded the return of Jong Nam's body while blaming Malaysia for his death, accusing the latter of colluding with South Korea.

"They are a rogue state. This is not North Korea, this is Malaysia. We have our laws," Nazri said.

On calls to revoke free visas for North Koreans visiting Malaysia, Mohamed Nazri said the move was not necessary.

"There is no need to revoke the visa as North Koreans aren't allowed to travel out of their country in the first place," he said. He added that only North Korean officials travelled here.

Jong Nam, 46, the estranged half-brother of North Korea leader Kim Jong Un, was assassinated on Feb 13 at Kuala Lumpur International Airport 2 by two women believed to be North Korean agents.

Four people have so far been arrested in relation to the case. They are Vietnamese Doan Thi Huong, 28; Indonesian Siti Aisyah, 25; North Korean Ri Jong Chol, 47, and Siti Aisyah's boyfriend, Muhammad Farid Jalaluddin, a Malaysian.

The remand for Doan and Siti Aisyah has been extended for a further seven days .

Malaysia police are also looking for four North Koreans suspects, who have returned to Pyongyang.

Malaysian police have requested the North Korean government hand them over.