HONOLULU – U.S. Coast Guard and military crews are searching the ocean off Hawaii for five crewmembers of an Army helicopter that reportedly went down during a training exercise, authorities said Wednesday.

Officials at Wheeler Army Airfield near Honolulu reported losing communications around 10 p.m. Tuesday with the crew of a UH-60 Black Hawk, the Coast Guard said in a news release.

Responding teams reported spotting a debris field about 2 miles west of Kaena Point, Oahu, shortly before 11:30 p.m., the release said.

An airplane, two helicopters and several boats are being used in the search across an area with light winds and 2-foot seas.

Two Black Hawk crews were conducting training between Kaena Point and Oahu’s Dillingham Airfield at the time communications were lost, officials said.