An outbreak of an unknown illness with primary symptoms of diarrhea, vomiting has stricken 89 of 2,164 passengers as well as 2 of 910 crew on board the Radiance of the Seas, according to a report on the CDC’s Vessel Sanitation Program website.

The Centers for Disease Control and Prevention (CDC) is investigating why more than 90 cruise passengers got sick on a Royal Caribbean ship that docked in Tampa on Saturday morning.

According to the Centers for Disease Control and Prevention (CDC), 89 passengers and two crew members aboard the "Radiance of the Seas" fell ill with an unknown sickness. The port's calendar shows that the cruise ship departed from Port Tampa Bay on Feb. 1 and is expected to return on Feb. 8.