WASHINGTON – One American worker at a natural gas complex in Algeria has been found dead, U.S. officials said Friday as the Obama administration sought to secure the release of Americans still being held by militants on the third day of the hostage standoff in the Sahara.

The officials identified the dead American as Frederick Buttaccio, a Texas resident, but said it was unclear how he died. They said U.S. officials recovered Buttaccio's remains on Friday and notified his family. Officials spoke on condition of anonymity because they weren't authorized to speak publicly on the matter.

A spokesman for the Buttaccio family in the Houston suburb of Katy, Texas, declined to comment.