Police attempt to hold back people trying to enter the National Assembly in front of the main gate of the National Assembly in Seoul, South Korea on December 3, 2024, after President Yoon Suk Yeol declared emergency martial law. Jung Yeon-je, AFP 

All political activities are banned in South Korea following the imposition of martial law on Tuesday and all media will be subject to government monitoring, martial law commander Park An-su said in a statement.

"All political activities, including those of the National Assembly, local councils, political parties, and political associations, as well as assemblies and demonstrations, are strictly prohibited," he said, adding: "All media and publications shall be subject to the control of the Martial Law Command."

South Korea's National Assembly was also sealed Tuesday after President Yoon Suk Yeol declared emergency martial law, the country's Yonhap news agency reported.

Helicopters were seen landing on the roof of the building in Seoul, in live television footage aired by broadcasters.

More details to follow.