Kim Jong Un's half-brother worked as a CIA informant in 2017 before being loudly murdered at a Malaysian airport on Monday.
Kim Jong Nam, the eldest son of North Korean dictator Kim Jong Il
The journal quoted "a person who knows the matter" in his report.
"There was a connection" between Kim Jong Nam and the intelligence service, according to the source of the journal.
INDONESIAN WOMAN AT KILL JONG KILLING US HALF-BROWNERS FROM PRISON
Little else is known about what Kim Jong Un's elder brother told the government; However, the report states that he was "almost certainly in touch with security services from other countries, notably China."
The CIA declined to comment on the WSJ.
A Vietnamese woman, who was tried in the case of Kim's death, was released from a Malaysian prison and returned to her homeland earlier this month. Doan Thi Huong, the last suspect in detention following the charge of VX nerve agents for Kim Jong Nam's death, said at the airport that "the case has come to a complete end."
MALAYSIA HAS STILL A & # 39; PROBLEM & # 39; WITH NORTH KOREA, TWO YEARS AFTER MURDERING KIM JONG AND HALFBROWER
In a video she expressed her thanks, "to all who have prayed for me" from her lawyer on the plane shortly before take-off Hanoi.
The 30-year-old and her co-defendant, Indonesian Siti Aisyah, were charged with having worked with four North Koreans to assassinate Kim Jong Nam.
The two women – who said they had blamed themselves for a harmless prank on a television program – slapped the nerve on 13 February 2017 at Kuala Lumpur International Airport. They were arrested days later and charged with murder.
In March, the Malaysian Attorney General dropped the murder charge stupidly against Aisyah after high-profile lobbying from Jakarta. Huong wanted to be acquitted after her co-defendant was released, but the prosecutor's office rejected her application.
INDONESIAN WOMAN OF KIM JONG KILLING US HALF-BROTHER, FEES DROPPED 19659005] Huong pleaded guilty to a lesser charge last month after the prosecutor dropped the murder charge against her Infringement. She was sentenced to 40 months in prison from the day of her arrest and released early for good behavior.
The four North Koreans left Malaysia on the day Kim was killed.
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Women's advocates said they were farmers in a political assassination with clear links to the North Korean Embassy in Kuala Lumpur and the prosecutor's office has shown no intention of killing. The intent to kill is crucial to murder charges under Malaysian law.
Kim Jong Nam was the eldest son in the current generation of the North Korean ruling family. He lived abroad for years, but could have been seen as a threat to the reign of Kim Jong Un.
Lucia I. Suarez Sang of Fox News contributed to this report.