The U.S. military says two cases of swine flu have been confirmed in soldiers at its medical center in Landstuhl, Germany.

Europe Regional Medical Command spokesman Steve Davis says four additional service members — two Navy and two Air Force personnel — with flu-like symptoms have "probable" cases of the virus.

Davis said Sunday that one Navy sailor had recently been in Italy but that the others had not been outside Germany.

All were sharing a common area at the Landstuhl hospital.

Davis said the two cases were confirmed Thursday and that employees who came in contact with them were offered preventative Tamiflu treatment. The six patients were moved to a building away from the main hospital before President Barack Obama visited on Friday.