Malaysia is considering expelling North Korea¡¯s envoy to the Southeast Asian nation or shutting its embassy in Pyongyang, as tensions escalate over the killing of the estranged half brother of the North¡¯s leader, Kim Jong Un, a senior government official said.

Kim Jong Nam, 46, was killed at Kuala Lumpur International Airport on Feb. 13 with what police believe was a fast-acting poison, as he prepared to board a flight to Macau where he lived in exile with his family under the protection of Beijing.

North Korea¡¯s ambassador said last week his country ¡°cannot trust¡± Malaysia¡¯s handling of the probe, and also accused the country of ¡°colluding with outside forces¡± ¡ª a veiled reference to bitter rival South Korea.