Police will be out in force, and subway stations and at least one school will be closed over safety concerns when South Korea's Constitutional Court rules whether to oust or reinstate impeached President Yoon Suk Yeol.

South Korean President Yoon Suk Yeol, who lawmakers voted to impeach and was indicted on criminal charges for declaring martial law last December, was cleared to be released from detention on Friday.

Police could also shut down gas stations near the court on the day of Yoon’s impeachment ruling, the official said. On Sunday, a day after Yoon returned home, thousands of his supporters gathered around his residence to protest the impeachment, surrounded by beefed-up police security.