MOSCOW, June 18 (RIA Novosti) - A visiting cruise ship has been quarantined off Venezuela's coast following an outbreak of swine flu on board.

More than 1,200 passengers and crew will be kept on board the Spanish-owned Ocean Dream for 10 days. The vessel has docked at Venezuela's Margarita island.

Three crew members have been diagnosed with the virus and another 11 have symptoms. The ship, run by the Spanish tour operator Pullmantur, was prevented from disembarking at previous stops in Barbados and Grenada.

The passengers' nationalities have not yet been disclosed.

Venezuela has reported 52 human swine flu cases with no fatalities. The virus has spread to at least 74 countries.

The World Health Organization declared the H1N1 virus a global pandemic last week. There have been some 30,000 cases diagnosed globally, of which 145 were fatal.