WASHINGTON (AP) — Military suicides surged this year to a record high among active duty troops, continuing a deadly trend that Pentagon officials say is frustrating and they are struggling to counter.

The Army, Navy and Marine Corps all saw the rate of suicides go up as well as the overall numbers, with only the Air Force showing a decrease, according to data released by the Pentagon Thursday. Suicides among members of the Reserves and the National Guard also grew.

The difficulties involved in identifying service members with possible problems and finding ways to prevent suicides were undersco...