The so-called Choongampa faction, a group with origins in the private school in Seoul where imprisoned South Korean President Yoon Suk-yeol studied in the 1970s, appears to be a key element in the plot behind his recently foiled decision to declare martial law.

The assembly impeached President Yoon Suk Yeol last month, but the Constitutional Court will decide whether to formally dismiss or reinstate him.

South Korean President Yoon Suk Yeol attended on Tuesday a Constitutional Court hearing of his impeachment trial where he denied ordering military commanders to drag lawmakers out of parliament during his short-lived bid to impose martial law.