MORRISVILLE — An airport official says a squabble between two flight attendants forced a United Airlines flight bound for Chicago to return to Raleigh-Durham International Airport.

Airport spokeswoman Mindy Hamlin says Flight 1214 left Raleigh at 6 a.m. Wednesday. She says a call from the pilot to the tower at 6:40 a.m. suggested there had been an assault onboard, but it turned out to be a tiff between flight attendants.

Raleigh-Durham police determined that no blows were exchanged and no one was arrested.

United spokeswoman Christen David says the two employees were removed and the flight re-staffed. David said the Chicago-based airline is conducting an internal review and that the argument was not physical.

Some passengers were placed on other flights, and David said United would compensate passengers for their inconvenience.