South Korea's opposition on Tuesday urged the country's Constitutional Court to formally remove ousted President Yoon Suk Yeol from office over his declaration of martial law, warning that "countless" people could have died had it succeeded.

South Korean President Yoon Suk Yeol is expected to make a closing statement on Tuesday in a Constitutional Court trial reviewing his impeachment, as public hearings wrap up and his political fate is placed in the hands of eight judges.

SEOUL (Reuters) - Oscar-winning director Bong Joon Ho said on Thursday he was proud of how his fellow South Koreans had overcome the fallout from impeached President Yoon Suk Yeol's short-lived imposition of martial law on December 3.

Traveling around Seoul in a prison transport vehicle, South Korean President Yoon Suk Yeol appeared in two different courts on Thursday, contesting his arrest on rebellion charges in one and fighting an effort to remove him from office in the other.

South Korean police are formally building a case against impeached President Yoon Suk Yeol over accusations he obstructed the execution of an arrest warrant, a police spokesperson said on Friday.

South Korea's ousted premier said on Thursday that he had opposed suspended President Yoon Suk Yeol's declaration of martial law, testifying for the first time at his former boss's impeachment trial about the events of a night that threw the country into turmoil.