Cruise ship brawl erupts in Carnival Magic's dance club

A massive brawl has broken out on a cruise ship as it returned to , prompting the Coast Guard to escort the ship back to dock and the NYPD to open a probe.

The fight began in the nightclub of the Carnival Magic at about 5.20am on Tuesday, on the final night of the ship’s eight-day Caribbean cruise with stops in Dominicana, Turks and Caicos, and the Bahamas. 

Video of the fracas shows a chaotic scene as dozens of passengers punch and shove each other, while an outnumbered ship security guard tries in vain to break up the fight.

The brawl started as an altercation between two passengers on the dance