The half-brother of Kim Jong-un was killed by a chemical attack in Malaysia on the orders of the North Korean government, the US has concluded.
Kim Jong-nam died after a bizarre encounter at Kuala Lumpur airport in 2017, when two women smeared his face with VX nerve agent.
The women, who claim they were told they were carrying out a prank for a TV show, are on trial for murder.
The US said it would imposed new sanctions on North Korea in response.
“This public display of contempt for universal norms against chemical weapons use further demonstrates the reckless nature of North Korea and underscores that we cannot afford to tolerate a North Korean WMD program of any kind,” said State Department spokeswoman Heather Nauert.
The US has consistently accused North Korea of being behind the attack on Kim Jong-nam.