OSAN AIR BASE, South Korea — Four of the most advanced U.S. fighter jets flew over South Korea on Wednesday in a clear show of force against North Korea, a day after South Korea’s president warned of the North’s collapse amid a festering standoff over its nuclear and missile ambitions.

The stealthy, high-tech F-22 planes capable of sneaking past radar undetected landed at Osan Air Base near Seoul after the flyover escorted by other U.S. and South Korean fighter jets.

Pyongyang will likely view the arrival of the planes flown from a U.S. base in Japan as a threat as they are a display of U.S. airpower apparently aimed at showing what the United States can do to defend its ally South Korea from potential aggression from North Korea.

“The F-22 ‘Raptor’ is the most capable air superiority fighter in the world, and it represents one of many capabilities available for the defense of this great nation,” Lt. Gen. Terrence J. O’Shaughnessy, deputy commander of the U.S. military command in South Korea, said in a statement.

“The U.S. maintains an ironclad commitment” to the defense of South Korea, he said.

The U.S. military would not say how long the F-22s will be deployed in South Korea.