The cruise ship Grand Princess, held at sea and barred from returning to San Francisco last week due to a coronavirus outbreak aboard the vessel, has been directed to the nearby port of Oakland, the cruise line said on Saturday, presumably to be placed under quarantine.

The ship, carrying some 2,400 passengers and 1,100 crew members, is due to reach Oakland, across San Francisco Bay from its original home port destination, on Monday, with the arrival time yet to be determined, Princess Cruises said in a statement.

The late-night announcement capped four days of uncertainty surrounding the vessel- the ship has been linked with at least four coronavirus cases from an earlier voyage- and the fate of 3,500 people returning from a cruise to Hawaii.