Kim Jong-un's half-brother 'was CIA informant before he was murdered'

Kim Jong-un’s estranged half-brother was an informant for the CIA before he was killed in 2017, it has been claimed.

There was a “nexus” between the US intelligence agency and Kim Jong-nam, a source “knowledgeable about the matter” told the Wall Street Journal.

The North Korean leader’s half-brother died after his face was smeared with the nerve agent VX, a banned chemical weapon, in February 2017.

"Several former US officials said the half-brother, who had lived outside of North Korea for many years and had no known power base in Pyongyang, was unlikely to be able to provide details of the secretive country's inner workings," the Journal said.

The former officials also said Kim Jong-nam had been almost certainly in contact with security services of other countries, particularly China's, the Journal said.

Kim Jong-nam's role as a CIA informant is mentioned in a new book about Kim Jong Un, "The Great Successor," by Washington Post reporter Anna Fifield that is due to be published on Tuesday.

Fifield said Kim Jong-nam usually met his handlers in Singapore and Malaysia, citing a source with knowledge of the intelligence.

The book claimed that security camera footage from Kim Jong-nam's last trip to Malaysia showed him in a hotel elevator with an Asian-looking man who was reported to be a US intelligence agent.

South Korean and US officials have said the North Korean authorities had ordered the assassination of Kim Jong-nam, who had been critical of his family's dynastic rule.

Pyongyang has denied the allegation.

Two women were charged with poisoning Kim Jong-nam by smearing his face with liquid VX, a banned chemical weapon, at Kuala Lumpur airport in February 2017. Malaysia released Doan Thi Huong, who is Vietnamese, in May, and Indonesian Siti Aisyah in March.