South Korean police have imposed travel bans on former Prime Minister Han Duck-soo and former Deputy Prime Minister for Economic Affairs Choi Sang-mok as part of an ongoing investigation into alleged insurrection, Xinhua reported.

The two former officials were listed as suspects earlier this month and are being investigated in connection with a failed martial law operation reportedly headed by ousted President Yoon Suk-yeol.

They were summoned for questioning on Monday by a special police investigative team, along with former Interior Minister Lee Sang-min, who has been under a travel ban since December, as reported by Xinhua.