South Korean police said Wednesday that security guards were blocking a raid on President Yoon Suk Yeol's offices to investigate his brief imposition of martial law.

Yoon is already banned from foreign travel as part of an "insurrection" probe into his inner circle over the dramatic events of Dec. 3-4 that stunned South Korea's allies.

Police said earlier that a Special Investigation Team "has conducted a raid" on the presidential office, on different police agencies and on the National Assembly Security Service.