Two US Navy warships operating in the Middle East have been affected by the coronavirus, AP reported.

A dozen troops aboard the USS San Diego amphibious transport dock have tested positive for COVID-19, 5th Fleet spokeswoman Rebecca Rebarich noted. The ship is in the port of Bahrain.

“All positive cases have been isolated on board, and the (ships) remains in a restricted COVID bubble,” Rebarich told The Associated Press. “The port visit and medical support have been coordinated with the host nation government and Bahrain Ministry of Health.”

On the second ship, the missile cruiser USS Philippine Sea, several people are suspected of having a coronavirus, Rebarich added. The ship is expected to enter the port for further tests.

The 5th Fleet patrols the waterways of the Middle East.