SEOUL, South Korea • The United States and its Asian allies flew dozens of fighter jets over waters surrounding the Korean Peninsula on Tuesday in a show of force as their diplomats discussed a coordinated response to a possibly imminent North Korean nuclear test.

The flights came as U.S. Deputy Secretary of State Wendy Sherman traveled to Seoul for discussions with South Korea and Japanese officials over the gathering North Korean threat and warned of a “swift and forceful” counterresponse if the North proceeds with a nuclear test explosion, which would be its first in nearly five years.

If staged, the test could be another leap forward in North Korean leader Kim Jong Un’s goal of building an arsenal that can viably threaten regional U.S. allies and the American homeland. That would escalate a pressure campaign aimed at forcing the United States to accept North Korea as a nuclear power and negotiating economic and security concessions from a position of strength.

While the Biden administration has vowed to push for additional international sanctions if North Korea conducts a nuclear test, prospects for robust punitive measures are unclear because of divisions between permanent United Nations Security Council members.

U.S. and South Korea air force fighter jets fly in formation during a joint drill Tuesday.

the associated press