North Korea’s military launched two “ground-to-ground tactical ballistic missiles” on Tuesday, pledging to further intensify launch activities to destroy the country’s “enemy,” according to state media.

This threat comes against the backdrop of ongoing large-scale U.S.-ROK joint military exercises that kicked off on Monday and will continue until March 23.

Framing the launch as a “demonstration launching drill for education” of the troops, the party-run Rodong Sinmun reported Tuesday that a Korean People’s Army missile unit launched the projectiles from a “medium-range system,” but did not give further details about the type of projectile.