Kim Yong-hyun, a former defence minister and close confidant to South Korean President Yoon Suk Yeol, became the first official to be arrested late on Tuesday over Yoon's martial law declaration. Kim attempted to take his own life while in detention,

Former South Korean Defence Minister Kim Yong-Hyun attempted suicide in detention after being accused of involvement in a failed martial law imposition. The incident is under investigation.

Defence minister Kim Yong-hyun was formally arrested on charges that include "engaging in critical duties during an insurrection".