South Korean opposition parties introduced a bill Thursday calling for an independent investigation into impeached President Yoon Suk Yeol’s brief martial law declaration, as thousands of his supporters and critics held tense rallies near his residence ahead of his potential detention.

A South Korean court issued warrants Tuesday to detain impeached President Yoon Suk Yeol and search his office and residence over his short-lived declaration of martial law.

Authorities sought on Friday to execute an unprecedented arrest warrant for impeached South Korean President Yoon Suk Yeol, evading a crowd of protesters but facing off with security forces inside his residence.