CHICAGO (CBS) — A United Airlines flight headed to Chicago was forced to turn back to Raleigh, N.C. after some sort of altercation between flight attendants.

The United pilot asked to return to Raleigh Durham International Airport after the dispute escalated on board.

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Law enforcement met the plane at the gate and the two workers were taken off the flight. After an investigation, it was determined that no physical altercation took place and nobody was arrested.

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United Flight 1214 left Raleigh at 6:30 a.m. and returned at 6:40 a.m.

Passengers were re-booked on other flights. Flight 1214 eventually made it to Chicago about two hours later than scheduled, arriving at 10:37 a.m.

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“We are conducting our own internal review,” said United spokesman Christen David. “We apologize to our customers for the delay and are compensating them for the inconvenience.”