A Marines Corps MV-22 Osprey in flight. Photo courtesy Marines
A Marines Corps MV-22 Osprey in flight. Photo courtesy Marines

Updated at 12:55 p.m., May, 20, 2015

A second Marine has died following the crash of a Camp Pendleton-based aircraft during a training mission in Hawaii, a Marine Corps spokesman said Wednesday.

The MV-22 Osprey, assigned to the 15th Marine Expeditionary Unit, went down Sunday while conducting routine training at Marine Corps Training Area- Bellows, according to USMC public-affairs Capt. Brian Block. The name of the second casualty was not immediately released.

Also fatally injured in the crash was 24-year-old Lance Cpl. Joshua E. Barron of Spokane, Washington, according to the 15th MEU.

The accident left 20 other Marines injured. Two of them remained hospitalized this afternoon in stable condition, Block said.

The 15th MEU departed San Diego on May 10 for a seven-month deployment.

The I Marine Expeditionary Force is heading an investigation into the cause of the crash, which took place in a training area in Waimanalo, on the island of Oahu

The 15th MEU departed San Diego on May 10 for a seven-month deployment.

The I Marine Expeditionary Force is heading an investigation into the cause of the crash, which took place in a training area in Waimanalo, on the island of Oahu.

—City News Service