This story has been updated with additional comment from Acting Assistant to the Secretary of Defense for Public Affairs Charles Summers Jr.

U.S. Acting Defense Secretary Patrick Shanahan on Thursday confirmed North Korea conducted a weapon test the previous day, though added it was not a ballistic missile.

The confirmation comes following an announcement from North Korean media on Wednesday which claimed the successful trial of a “tactical guided weapon.”

“There was a test … Also, there’s no change to our posture or to our operations,”   Shanahan told assembled reporters at the Pentagon, though declined to give further information on the DPRK test.