Lawyers representing South Korea’s impeached president said Thursday he will refuse further questioning after being detained by anti-corruption officials over his ill-fated declaration of martial law last month,

Impeached South Korean President Yoon Suk Yeol was arrested and questioned for hours by investigators in relation to a criminal insurrection probe, ending a weeks-long standoff with authorities.

Authorities detained the impeached Yoon Suk Yeol, a move some say prolongs the divisions that have racked South Korea since he declared martial law last month.