In a shocking development caught on camera, the leader of South Korea's main opposition party was stabbed in the neck during a press conference in the southern port city of Busan.
The prominent politician, who is called Korean Trump but “respects Bernie Sanders”, was taken to hospital.
“Lee Jae-myung, who narrowly lost the 2022 presidential election, was stabbed in the left side of his neck on Tuesday morning. The male attacker was arrested at the scene.
Lee was taken to hospital about 20 minutes after the attack. Yonhap said he was conscious at the time.
Mr. Lee is not currently a member of South Korea's legislature, but is widely expected to run for the seat in the next general election, which will be held in April 2024.
He lost the 2022 presidential election by a margin of 0.73% in the vote to incumbent President Yoon Suk-yeol, making it the closest presidential race in South Korean history.
The pictures show the attacker stabbing the politician and being immediately subdued by several people present.
The Busan Emergency Office said Lee was attacked while visiting the construction site of a new airport in the city.
She added that Lee, leader of the main opposition Democratic Party, was conscious but his exact condition was not known.
South Korean media quoted witnesses as saying that the man used a knife-like weapon to wound Lee's neck.
GRAPHIC VIDEO WARNING: An unidentified man attacks South Korean opposition leader Lee Jae-myung.