KUALA LUMPUR, Malaysia — North Korea said Friday it will reject the results of an autopsy on its leader’s estranged half brother, the victim of an apparent assassination this week at an airport in Malaysia. Pyongyang’s ambassador said Malaysian officials may be ‘‘trying to conceal something’’ and ‘‘colluding with hostile forces.’’

Speaking to reporters gathered outside the morgue in Kuala Lumpur, North Korean Ambassador Kang Chol said Malaysia conducted the autopsy on Kim Jong Nam ‘‘unilaterally and excluding our attendance.’’

Kim Jong Nam, who was 45 or 46 and had lived in exile for years, suddenly fell ill at the Kuala Lumpur airport on Monday as he waited for a flight home to Macau. Dizzy and in pain, he told medical workers at the airport he had been sprayed with a chemical. He died while being taken to a hospital.

‘‘We will categorically reject the result of the post-mortem,’’ Kang said, adding that the move disregarded ‘‘elementary international laws and consular laws.’’

South Korea has accused its enemies in North Korea of dispatching a hit squad to kill Kim Jong Nam at the airport in Kuala Lumpur, saying two female assassins poisoned him and then fled in a taxi.

North Korean diplomats in Malaysia objected to an autopsy and had requested custody of Kim Jong Nam’s body. Malaysian authorities went ahead with the procedure, saying they did not receive a formal complaint.

Associated Press