BAYONNE - A norovirus outbreak onboard the Celebrity Summit cruise ship sickened more than 300 passengers and crewmembers, according to the Centers for Disease Control and Prevention.

The ship embarked on a two-week Canadian and New England vacation on Sept. 21 and returned to Bayonne today.

According to Celebrity Cruise Lines, 307 of 2,112 passengers reported feeling ill during the voyage, with the predominant symptoms being vomiting and diarrhea. They say 14 of the 952 crewmembers also reported feeling sick.

Specimens were collected and offloaded in Halifax, Canada for testing in Health Canada’s laboratory, confirming the cause of the outbreak was norovirus.

Many passengers who were onboard the ship told News 12 that they experienced intense stomach pains.

In response to the outbreak, the cruise line says it has increased cleaning and disinfecting procedures and is following protocols provided by the CDC.

Passengers heading to the port for another cruise on that same ship say their boarding time was delayed while the crewmembers disinfected the boat.