A disastrous U.S. military vehicle accident in Afghanistan on Monday left one service member dead, two others in medical treatment and six others with possible traumatic brain injury.

The Pentagon identified the soldier killed during non-combat operations as 24-year-old Army Staff Sgt. David Thomas Brabander, who is originally from Anchorage, Alaska. He died in an accident Monday in Nangarhar Province.

Lucas Tomlinson of Fox News reported Tuesday that six others who were also in the vehicle may be suffering from traumatic brain injury.

As released by the Pentagon, Brabander was part of 3rd Battalion, 509th Infantry Regiment, 4th Infantry Brigade Combat Team (Airborne), 25th Infantry Division.

“We are deeply saddened by the loss of one of our own,” Army Gen. John Nicholson, top U.S. commander in Afghanistan, said in a statement Monday. “Our deepest sympathies and prayers are with the families and friends of our fallen and injured comrades.”

His death is currently under investigation.

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