HONOLULU — The Army is ending active efforts to locate remains and retrieve wreckage after a helicopter crashed off Hawaii last month.

The 25th Infantry Division said in a statement Thursday officials wrapped up the search after concluding it was unlikely to find additional remains. Investigators also determined they had gathered enough evidence for a thorough probe into the cause of the crash.

All five crew members on board were killed when the UH-60 helicopter went down off Oahu on Aug. 15.

The crew were Chief Warrant Officer 2 Stephen Cantrell of Wichita Falls, Texas; Chief Warrant Officer 3 Brian Woeber of Decatur, Alabama; 1st Lt. Kathryn M. Bailey of Hope Mills, North Carolina; Staff Sgt. Abigail R. Milam of Jenkins, Kentucky and Sgt. Michael L. Nelson of Antioch, Tennessee.