Two U.S. Air Force F-22 Raptor stealth jet fighters fly near Andersen Air Force Base in Guam in this handout photo dated August 4, 2010.[Photo/Agencies]

WASHINGTON - The United States sent F-22 stealth fighter jets to South Korea on Sunday to join military drills aimed at underscoring the U.S. commitment to defend Seoul in the face of an intensifying campaign of threats from the Democratic People's Republic of Korea(DPRK).

The advanced, radar-evading F-22 Raptors were deployed to Osan Air Base, the main U.S. Air Force base in South Korea, from Japan to support ongoing bilateral exercises, the U.S. military command in South Korea said in a statement that the DPRK to restrain itself.

"(North Korea) will achieve nothing by threats or provocations, which will only further isolate North Korea and undermine international efforts to ensure peace and stability in Northeast Asia," the statement said.

In a rare U.S. show of force aimed at the DPRK, the United States on Thursday flew two radar-evading B-2 Spirit bombers on practice runs over South Korea.

The F-22 jets will take part in the annual U.S.-South Korea Foal Eagle military drills, which are designed to sharpen the allies' readiness to defend the South from an attack by the DPRK, the U.S. military said.

The U.S. military did not say how many of the planes were flown to South Korea from Kadena Air Base in Okinawa. The statement described Sunday's deployment as part of routine shifts of air power among bases in the Western Pacific that U.S. forces have been conducting since 2004.