Lawyers for impeached South Korean President Yoon Suk Yeol failed in their court effort to secure his release on Thursday, a day after he was detained at his residence for questioning over rebellion allegations linked to his martial law declaration last month.

Demands have been made for the formal arrest of Yoon Suk Yeol. South Korea’s impeached president argued for his release before a Seoul judge as the court reviewed whether to grant a law enforcement request for his formal arrest.

A standoff between rival government forces outside the presidential compound in South Korea is a startling development, even for observers used to the country’s famously rough and tumble politics