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

It’s the first time a warrant has been issued to detain a sitting South Korean president. But experts say there is little chance of detention or searches unless Yoon is formally removed from office.

The Seoul Western District Court issued warrants to detain Yoon and to search the presidential office and residence in central Seoul, according to a statement from the Corruption Investigation Office for High-Ranking Officials, which is leading a joint investigation with police and military authorities.

The agency says it’s been investigating whether Yoon’s Dec. 3 declaration amounted to rebellion. Under South Korean law, the leader of a rebellion can face the death penalty or life imprisonment if convicted. Yoon has presidential immunity from most criminal prosecutions, but the privilege does not extend to allegations of rebellion or treason.

Yoon’s powers have been suspended since the opposition-controlled National Assembly voted to impeach him on Dec. 14 over his imposition of martial law, during which hundreds of troops and police officers were deployed at the assembly. By law, a president in South Korea is allowed to declare martial law only during wartime or similar emergencies and has no right to suspend parliament’s operations even under martial law.

Yoon has argued his decree was a legitimate act of governance, calling it a warning to the main liberal opposition Democratic Party — which he has called “a monster” and “anti-state forces” — that has used its legislative majority to impeach top officials, undermine the government’s budget, and which he claims sympathizes with North Korea.

The Constitutional Court is to determine whether to dismiss Yoon as president or reinstate him. Experts said Yoon is likely to ignore the warrants. He’s already dodged repeated requests by investigative authorities to appear for questioning, and the presidential security service has blocked attempts to search his office and residence citing a law that bans raids on sites with state secrets.

Yoon Kap-keun, a lawyer for the president, called the detainment warrant “invalid” and “illegal,” saying the anti-corruption agency lacks legal authority to investigate rebellion charges. The presidential security service said it will provide security to Yoon in accordance with the law.

The anti-corruption agency said it has no immediate plans on when it would proceed with the warrants.