Seven military service members died this week in three US aviation accidents

A total of seven service members died in three military aviation accidents this week in the U.S., according to ABC News.

On Friday, two soldiers were killed during a training flight of an Apache attack helicopter at Fort Campbell, Kentucky, ABC News reported.

What happened?

The U.S. Army released the following statement: "At approximately 9:50 p.m. Friday, two soldiers of the 101st Combat Aviation Brigade, 101st Airborne Division (Air Assault) were killed in an AH-64E Apache helicopter crash in the local training area on Fort Campbell."

The soldiers were assigned to the 101st Combat Aviation "Destiny" Brigade. They were identified as Chief Warrant Officer 3 Ryan Connolly, 37, was an instructor pilot in the brigade, and Warrant Officer James Casadona, 28, a pilot in the brigade, according to ABC News.

"The Destiny Brigade has suffered a great tragedy and our thoughts and prayers go out to the families of the deceased," said Col. Craig Alia, commander, 101st Combat Aviation Brigade, 101st Airborne Division, in a statement released by the Army.

"This is an unfortunate event, and we are saddened by the loss of our fellow soldiers. We ask that everyone respect the privacy of the families as they grieve the loss of their loved ones," he added.

Where were the other crashes?

In addition to the deaths that happened Friday, an F-16 crashed Thursday near Nellis Air Force Base in Nevada, killing Maj. Stephen Del Bagno, a member of the Air Force's elite Thunderbirds flight-demonstration team, according to ABC News.

And on Tuesday, a Marine CH-53E Super Stallion helicopter crashed near El Centro, California, during a training flight. Four marines were killed: Capt. Samuel A. Schultz, 28; First Lt. Samuel D. Phillips, 27; Gunnery Sgt. Derik R. Holley, 33; and Lance Corp. Taylor J. Conrad, 24, the report states.

There were two additional aviation accidents in the east African nation of Djibouti, but there were no casualties, ABC News reported.