The fresh deployment comes after North Korea suffered heavy casualties on the front lines in Russia’s war against Ukraine, the South’s spy agency says.

A visit by a U.S. aircraft carrier to South Korea prompted a warning from the sister of North Korea’s leader that Washington and Seoul “should not test” the communist regime.

North Korean leader Kim Jong Un's influential sister said Tuesday that the deployment of a U.S. aircraft carrier to South Korea would prompt Pyongyang to bolster its nuclear arsenal and ramp up military provocations.