South Korean Democratic Party Leader Stabbed in Neck on Video -

STABBED IN THE NECK

The head of South Korea's Democratic Party was brutally stabbed by a knife-wielding suspect during a press conference ... and the horrifying attack was all caught on video.

Lee Jae-myung was at a public event surrounded by a gaggle of reporters and TV cameras in South Korea's port city of Busan Tuesday when the assailant approached him for an autograph before suddenly plunging a knife into his neck.

Check out the crazy clip ... Lee grimaces in pain as he collapses to the ground after the stabbing. The crowd jumps on the suspect, who's wearing a blue, paper crown around his head, tackling him to the pavement.

Other footage shows Lee lying face up on the ground with his eyes closed as someone applies a handkerchief to his neck wound to stop the bleeding.

Lee was rushed to a hospital in Busan, where he was given emergency care for his neck injury, which was not life-threatening, according to Reuters. He was then airlifted to a medical facility in the capital city of Seoul for additional treatment.

South Korean Democratic Party spokesman Kwon Chil-seung held a press conference, saying that medical staff believes Lee suffered damage to his jugular vein.

Meanwhile, police quickly responded to the crime scene and arrested the 66-year-old man, who did not provide a motive for the attack. The suspect reportedly faces an attempted murder charge.