The United States Air Force's B-2 stealth bombers that can carry nuclear weapons conducted its first- ever firing drill in South Korea, the Combined Forces Command said Thursday.

An official at the command confirmed by phone that two B-2 Spirit Bombers were sent from Whiteman Air Force Base in the US state of Missouri to the Korean Peninsula to carry out a firing drill as a warning to the Democratic People's Republic of Korea ( DPRK), which has threatened a nuclear attack on the US and South Korea.

The drill came as part of the two-month field training exercise "Foal Eagle" that involves 10,000 US troops and 200,000 South Korean soldiers. The joint military drill, launched on March 1, will run through April 30 to test the combat readiness of the allied forces.

"As the B-2 has radar-evading stealth function, it can penetrate the anti-aircraft defense to drop conventional and nuclear weapons," Yonhap News Agency reported a senior military official as saying. "It is the strategic weapon most feared by North Korea (DPRK)."

In addition to the B-2 stealth bombers, the US forces deployed other nuclear-capable weapons during this year's joint military drill. Those include B-22 bombers and submarine USCheyenne, both of which can carry nuclear weapons.