A gastrointestinal illness has broken out this week on the Radiance of the Seas cruise ship, according to the US Centers for Disease Control and Prevention.

It follows a recent unknown outbreak with similar symptoms that afflicted the Royal Caribbean Radiance of the Seas sailing out of Tampa.

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.