Passengers are seen onboard the Costa Smeralda cruise ship in Civitavecchia, Italy January 30, 2020 in this still image obtained from a social media video. @Xaideta/via REUTERS

ROME (Reuters) - Tests on a passenger from Macau aboard a cruise liner blocked in an Italian port confirmed on Thursday she did not have coronavirus, an Italian health ministry spokesman said.

About 6,000 people were prevented from disembarking for safety reasons in the Italian city of Civitavecchia, north of Rome.

The passenger was a 54-year-old woman who had boarded Costa Crociere company’s ship Costa Smeralda on Jan.25 in the port of Savona. She came down with fever and flu-like symptoms. Both she and her partner were placed in an isolation unit on the ship.