Tests of 12 crew members aboard the TUI Cruises Mein Schiff 6 cruise ship have come back positive.
The ship, carrying 920 passengers, is on its way to the Greek island of Piraeus after the positive results were announced by Greece's Civil Protection agency and reported by Reuters.
"They are all asymptomatic. There are PCR test kits on board. The vessel will most likely return to Piraeus port for repeat rapid COVID-19 tests," an official at the Civil Protection Agency said
TUI commented that the crew that have tested positive have been isolated on the ship.
All passengers having tested negative for COVID-19 before boarding the ship in Crete.
TUI Cruises is a German cruise line, which is a joint venture between TUI AG and U.S. cruise line operator Royal Caribbean Group.