An investigation has been launched after more than 140 people were hit with symptoms of illness while on board a Royal Caribbean ship. The US CDC is looking into what happened after passengers started showing signs of acute gastroenteritis (AGE), which is usually caused by norovirus.

Over 140 passengers and crew members aboard a Royal Caribbean International cruise ship were sickened by a gastrointestinal illness that led to vomiting and diarrhea, according to the Centers for Disease Control and Prevention.