If motion is successful, it would be country’s second impeachment of a head of state in less than two weeks

South Korea’s opposition said on Thursday it had filed an impeachment motion against the acting president, Han Duck-soo, in an escalating row over the composition of the constitutional court which will decide whether to remove his predecessor from office.

South Korea became mired in a political crisis when President Yoon Suk Yeol, currently suspended, declared martial law on 3 December.