US Vice Admiral Brad Cooper, deputy commander of US Central Command, told Reuters that on Thursday, three US servicemen were injured in the Gaza Strip, with one of them in critical condition at an Israeli hospital. 

Cooper emphasized that the US troops have suffered noncombat injuries during the operation to build and operate a pier off the coast of Gaza to bring humanitarian aid to Palestinians.

The other two troops sustained a sprained ankle and a minor back injury. They have since returned to duty. 

No further details of the incident have been provided by CENTCOM.