The half-brother of North Korean leader Kim Jong-un has been killed in Malaysia, South Korean and Malaysian sources say.

Kim Jong-nam, 45, is said to have been targeted at the airport in Kuala Lumpur, the capital, the BBC reports.

A source close to the Malaysian PM's office told the BBC that Mr Kim was killed in the city, saying his body was now undergoing an autopsy.

Kim Jong-nam is the eldest son of former North Korean leader Kim Jong-il.

Senior Malaysian police have confirmed that a North Korean man died in transit to hospital from the airport on Monday. They have not confirmed his identity.

Both South Korean state news agency Yonhap and Reuters news agency are reporting Mr Kim's death based on South Korean government sources.

According to a report from TV Chosun, a cable television network in South Korea, Mr Kim was poisoned at the airport by two women, believed to be North Korean operatives. These details have not been confirmed elsewhere.