Lawyers for South Korea’s impeached president say he will appear at a hearing in a Seoul court to oppose a formal arrest over last month’s imposition of martial law

South Korea’s impeached president, Yoon Suk Yeol, was formally arrested early Sunday, days after being apprehended at his presidential compound in Seoul. He faces possible imprisonment over his ill-fated declaration of martial law last month.

The disgraced leader will now remain in custody, with the new warrant allowing investigators to keep him for up to 20 days.