Acting Defense Secretary Patrick Shanahan is confirming that North Korea conducted a test launch on Wednesday, but he declined to provide any details.

He is the first U.S. official to confirm the launch. He tells reporters at the Pentagon that North Korea conducted a test, but it didn't involve a ballistic weapon and didn't trigger any change in U.S. military operations.

North Korea has said it test-fired a new type of tactical guided weapon. The test didn't appear to be of a banned mid- or long-range ballistic missile that could scuttle ongoing nuclear negotiations.

Pyongyang also is demanding that Washington remove Secretary of State Mike Pompeo from nuclear negotiations. The State Department says it's aware of the report and the U.S. remains ready to engage North Korea in constructive negotiations.