The attack was apparently triggered when an agent asked the passengers to verify the size of their carry-on bags before boarding the plane.
The Detroit Free-Press reports:
A group of passengers attacked two Spirit Airlines agents at Detroit Metro Airport on Sunday.
Both of the agents were injured from the dispute. One of the agents was taken to a hospital, a spokesperson from Spirit said...
According to the airline company, three passengers attacked the agents while boarding flight 646 from Detroit to Atlanta.
“The agents attempted to calmly defuse the situation but were physically assaulted by these passengers as they closed a door to stop them from boarding the aircraft," Spirit's statement said.
The two passengers were reportedly arrested. A third was cited and released.