CDC says 134 passengers fell ill with gastrointestinal symptoms on a Royal Caribbean cruise from Los Angeles, with the cause still under investigation ...

Passengers and crew members became ill with symptoms on Royal Caribbean's Navigator of the Seas cruise to Mexico, prompting enhanced cleaning protocols on the ship.

Royal Caribbean's Navigator of the Seas was on a week-long, round-trip cruise when passengers became sick, the CDC said.

The CDC is investigating the cause of a gastrointestinal outbreak on a Royal Caribbean cruise sailing.