South Korea’s president, Yoon Suk Yeol, has declared martial law in an unannounced late-night televised address, claiming he would eradicate “shameless pro-North Korean anti-state forces”.

It is the first time since 1980 that martial law was declared in South Korea.

“I declare martial law to protect the free Republic of Korea from the threat of North Korean communist forces, to eradicate the despicable pro-North Korean anti-state forces that are plundering the freedom and happiness of our people, and to protect the free constitutional order,” Yoon said.