KINGSTON, Jamaica (AP) — U.S. health officials will board a cruise ship docked in the U.S. Virgin Islands to investigate an illness outbreak that has stricken at least 300 people with gastrointestinal symptoms including vomiting and diarrhea, a cruise company spokeswoman said Sunday.

The U.S. Centers for Disease Control and Prevention has said that 281, or nearly 10 percent, of the 3,050 passengers aboard Royal Caribbean International’s Explorer of the Seas have reported getting sick. Twenty-two 22 crew members also report feeling ill.