An American soldier has died after being injured during Washington’s problem-plagued operation to establish a temporary aid pier on the coast of Gaza, the US military said, AFP reports.

“It is with great sadness that we announce the passing of Sgt. Quandarius Davon Stanley, a recently retired motor transport operator,” Captain Sheila Milford-Glover, spokesperson for the 3rd Expeditionary Sustainment Command, said in a statement.

She did not say when Stanley died or what kind of injury he had sustained, specifying only that the soldier had been receiving treatment in a long-term care facility.

He was one of three US military personnel who suffered non-combat injuries at sea during the pier operation. The two others suffered minor injuries, a sprained ankle and a hurt back, the military said in May.