PSS chief Kim Seong-hoon attends to be questioned at the National Office of Investigation in Seoul, Jan. 24. Yonhap

Police said Monday they were trying to raid the Presidential Security Service (PSS) in connection with its alleged attempt to block investigators from executing a warrant to detain President Yoon Suk Yeol last month.

The raid targets acting PSS chief Kim Seong-hoon and Lee Kwang-woo, head of the PSS bodyguard division, who are suspected of obstructing official duties and abusing their power to stop investigators during their first attempt to detain Yoon over his short-lived imposition of martial law.

Police said investigators have been sent to the PSS office on the presidential office compound in Yongsan, central Seoul, and are currently waiting to be given access for the search and seizure.

Investigators were also sent to search Kim and Lee's homes, where they secured two phones each — a personal cellphone and a secure work cellphone.

The server for the secure phones is located at the PSS office.

Police have twice requested arrest warrants for Kim and Lee but both times were rejected by the prosecution.

A police official said a third request is likely. (Yonhap)