UPDATE: (CNN) # The remains of two U.S. Army soldiers who disappeared Wednesday north of Baghdad have been found, U.S. Central Command announced Saturday.

The remains were recovered approximately 20 miles northwest of Baghdad, Central Command said, after an exhaustive search using helicopters, armored vehicles and tanks.

The soldiers # Sgt. 1st Class Gladimir Philippe, 37, of Linden, New Jersey, and Pfc. Kevin Ott, 27, of Columbus, Ohio # were last reported traveling in a Humvee near a checkpoint when military officials lost contact with them.

It was not immediately clear how they died, but the checkpoint has been the site of attacks against U.S. forces.

Six people were in custody in connection with the case, officials said.