ROMULUS, Mich. – Two Spirit agents were injured, two passengers were arrested and another was cited this weekend following a bag dispute at Detroit Metro Airport, the airline says. According to Spirit Airlines, “three passengers attacked our agents without provocation.”The incident happened Sunday while the passengers were trying to board flight 646 from Detroit to Atlanta, according to Spirit. When the agents asked the passengers to verify that their carry-on bags were appropriate sizes before boarding, the passengers became combative, according to airline officials. The agents tried to defuse the situation but were “physically assaulted” as they closed a door to stop the passengers from boarding, Spirit officials said. One of the agents was taken to a nearby hospital after the incident, airline officials said.