South Korean prosecutors on Sunday detained a former defence minister who allegedly recommended last week’s brief but stunning martial law imposition to President Yoon Suk Yeol, making him the first figure detained in the case.

The development came a day after Yoon avoided an opposition-led bid to impeach him in parliament, with most ruling party lawmakers boycotting a floor vote to prevent the two-thirds majority needed to suspend his presidential powers. The main opposition Democratic Party said it will prepare a new impeachment motion against Yoon.