Two U.S. Navy sailors were found dead Tuesday in a hotel room in the West African nation of Ghana, the U.S. Navy said.

The sailors were stationed aboard the USS Fort McHenry, which is on a seven-month voyage through the Gulf of Guinea aimed in part at training local militaries on maritime security.

They were found dead in their room at a hotel in Tema, where they had taken time off during the mission, the Navy said in a statement

"The cause of death is unknown and is being investigated by host nation authorities in cooperation with U.S. Navy," the statement said, giving no other details.