A gunman took 180 passengers on board a plane hostage at a Jamaican airport late on Sunday evening, but released all its passengers unharmed later, according to a CNN report.However, five crew members of the Canadian plane were still being held as hostages, airline officials said.A spokeswoman for the airport told CNN that the hostage crisis took place while a CanJet flight was taking off from Sangster International Airport in Montego Bay to Halifax, Canada.