Two people were injured in an explosion at Picatinny Arsenal base Wednesday.

ROCKAWAY TOWNSHIP -- Two U.S. Army civilian employees were injured this morning in an explosion at Picatinny Arsenal research facility, officials said.

Picatinny Arsenal spokesperson Frank Misurelli said one person was flown by medical helicopter to a local hospital while the other was transported by ambulance after the explosion occurred at about 11 a.m. Update, 4:45 p.m.: One of the two has been released from the hospital.

Both individuals sustained severe, but non-life-threatening injuries, said Brigadier General Patrick W. Burden at a press conference Wednesday afternoon. Burden is the senior commander of the base.

The injured employees are explosives technicians who were conducting an operation on "an explosive submunition" when the explosion occurred, base officials said in a news release. A submunition is a small device that is part of a larger warhead and separates from it prior to impact.

Burden said the explosion occurred while the technicians were dismantling the submunition.

Two hours after the explosion, explosive ordnance disposal technicians were still in the process of clearing the scene, base officials said in a news release.

"The incident is currently under investigation and all explosives-related operations are currently suspended," officials said.

Some of the work performed at Picatinny Arsenal base includes the development of munitions and explosives.

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Justin Zaremba may be reached at jzaremba@njadvancemedia.com. Follow him on Twitter @JustinZarembaNJ. Find NJ.com on Facebook.