The Royal Caribbean’s Oasis of the Seas cruise ship is cutting short a voyage after 277 passengers and crew members came down with gastrointestinal illness, the cruise line says.

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The ship will return to Port Canaveral, Florida, on Saturday, a day earlier than scheduled, CNN reported.

The ship left Sunday for a planned seven-night cruise that included planned stops in Haiti, Jamaica and Mexico.

“All of the ship’s guests will receive full refunds of their cruise fare paid,” according to Owen Torres, spokesperson for Royal Caribbean, CNN reported. “We think the right thing to do is to get everyone home early rather than have guests worry about their health.”

Cruise line officials said lab tests are being conducted to determine if the outbreak was caused by norovirus, the most common cause of acute gastroenteritis in the U.S.

There were 11 gastrointestinal illness outbreaks on cruise ships in 2018, and five were caused by norovirus, CNN reported.

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