South Korea’s opposition party leader Lee Jae-myung has been attacked during a visit to the southern port city of Busan, the country’s Yonhap news agency reported.

Lee was stabbed on the left side of his neck with a weapon by an unidentified man, Yonhap said, adding that the assailant was subdued and arrested at the scene.

TV footage showed a man lunging at Lee and striking him in the neck with an object. Lee is then seen collapsing as people rush to aid him

News photographs published showed Lee lying on the ground with his eyes closed and other people around him pressing a handkerchief against the side of his neck.

Lee was conscious as he was taken to hospital, Yonhap said.

Chief of the Democratic Party, Lee lost to conservative Yoon Suk Yeol in a tight presidential race last year.

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Reuters and Agence France-Presse contributed to this report