South Korea's ex-defense minister detained over martial law declaration, reports say

South Korean prosecutors on Sunday detained a former defense minister who allegedly recommended last week's brief but stunning martial law imposition to President Yoon Suk Yeol, making him the first figure detained over the case, news reports said.

The reported 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 liberal opposition Democratic Party said it will prepare a new impeachment motion against Yoon.

However, according to Agence France-Presse, Yoon's ruling People Power Party said in a statement Sunday that it had "effectively obtained (Yoon's) promise to step down."