Dozens more people on a cruise ship quarantined in the port of Yokohama, Japan, tested positive for the coronavirus on Friday and thousands of passengers remained confined to their cabins, only allowed on deck briefly for fresh air.

The Diamond Princess, owned by Miami-based Carnival Corp, was placed on a two-week quarantine on arriving at Yokohama on Monday after a man who disembarked in Hong Kong was diagnosed with the virus.

Japanese Health Minister Katsunobu Kato told a news conference that 41 people on the liner had tested positive for coronavirus on Friday, bringing the total of confirmed cases to 61. Twenty-one of the new cases were Japanese.

Those infected were taken off the ship and moved to hospitals in Tokyo and neighboring towns, the health ministry said. Blue and white tarpaulin sheets were hung up to screen them from the view of other passengers.

The 61 cases came from a sample of 273 people who had been tested because they had showed symptoms or been in close contact with those who did. More tests will be done if any more passengers develop symptoms, Kato said.

About 3,700 people are aboard the Diamond Princess, which usually has a crew of 1,100 and a passenger capacity of 2,670.

REUTERS