The powerful sister of North Korean leader Kim Jong Un threatened Tuesday to launch high-profile provocations in response to the arrival of a U.S. aircraft carrier in South Korea and other U.S. military activities,

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 U.S. aircraft carrier has arrived in South Korea in a show of force, days after North Korea test-launched cruise missiles to demonstrate its counterattack capabilities.

The arrival of the carrier Carl Vinson and its strike group at the South Korean port of Busan was meant to display a solid U.S-South Korean military alliance in the face of persistent North Korean threats, and boost interoperability of the allies’ combined assets, the South Korean navy said in a statement.

The warning by Kim Yo Jong implies North Korea will likely ramp up weapons testing activities and maintain its confrontational posture against the US.

The U.S. aircraft carrier USS Carl Vinson arrived at the southern port city of Busan in South Korea on Sunday as a show of force against North Korea, South Korea's navy said. It is the first U.S. aircraft carrier to dock at a South Korean port since U.