French authorities have detained a group of British cruise passengers at the port of Le Havre, intensifying a diplomatic row over a suspected gastroenteritis outbreak aboard the MS Queen Victoria. The ship, operated by Cunard Line, was denied permission to dock in Marseille earlier this week after more than 200 passengers and crew reported symptoms of the highly contagious norovirus. Passengers were taken into quarantine facilities near the port late on Wednesday, with French health officials citing concerns over “public health security”.

The British Foreign Office confirmed it was providing consular assistance to those affected. The move represents a significant escalation in France’s response to the outbreak, which began five days ago and has spread rapidly among the ship’s 2,500 passengers. French authorities have demanded a full medical audit and disinfection of the vessel before it can resume its Mediterranean itinerary.

The situation threatens to disrupt the peak summer cruise season and has drawn criticism from passenger advocacy groups who describe the detention as “disproportionate”. Cunard stated it was cooperating fully but expressed concern over the conditions of the quarantine. The incident underscores the vulnerability of mass tourism to infectious disease outbreaks and the complex legal frameworks governing international maritime travel.

Public health experts note that cruise ships are particularly susceptible to norovirus due to close living quarters and shared facilities. As the crisis deepens, diplomatic channels remain open, but no resolution has been reached.