Five passengers from Marine C-130J flight display decompression sickness symptoms

Five passengers from a recent Marine Corps C-130J flight displayed symptoms of decompression sickness after the aircraft experienced a loss of pressurization at 21,000 feet, according to the service.

At approximately 11:20 a.m. On Aug. 15 a C-130J from Marine Aerial Refueler Transport Squadron-352 departed Marine Corps Air Station Miramar, CA, with 46 passengers and experienced pressurization loss during a scheduled training mission, according to the statement.

"The air crew expertly executed appropriate procedures and safely landed at MCAS Miramar," according to the service. "Four Marines and one Sailor from 3rd Low Altitude Air Defense Battalion based at Camp Pendleton, California, displayed systems of decompression sickness the following day and were treated at Naval Medical Center San Diego. The Marines and Sailor were treated and released, and did not require hospitalization."

The cause of the incident is under investigation.