A United Airlines flight attendant was taken to a Chicago hospital following an incident on a United flight from San Francisco to Chicago on Sunday morning.

"A disruptive customer on a flight from San Francisco to Chicago was removed by law enforcement upon landing on Sunday, and one member of the flight attendant crew was taken to a hospital for evaluation," United Airlines said in a statement.

Chicago police responded to a gate at Chicago's O'Hare International Airport on Sunday morning after a "disturbance" on United Flight 476. Three people on the plane were taken to nearby Resurrection Hospital for observation, according to a statement from the Chicago Police Department.

A video captured by a passenger shows several flight attendants confronting a woman carrying a child. Screaming and yelling are heard as the passenger screams out, "Where is it?"

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Two flight attendants stand in front of a woman carrying a child on a flight

United Airlines flight attendants confront a "disruptive customer" on a flight from San Francisco to Chicago on Sunday morning. (Twitter @PeterKondelis)

One of the flight attendants tells the woman, "Ma'am, we are landing," before saying, "Sarah, step back. Step back. Sarah, step back," in a panicked tone.

The flight attendant continues to tell "Sarah" to step back as another flight attendant is seen running toward the encounter from the front of the plane.

A flight attendant runs down the aisle during confrontation with passenger

A United Airlines flight attendant was taken to a nearby hospital after an incident with a customer on the plane. (Twitter @PeterKondelis)

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"We’re grateful to our crew for handling this difficult situation with professionalism and for putting the safety of our team and our customers first," United Airlines said in the statement. 

United Airlines plane

A United Airlines Boeing 777 arrives at Chicago's O'Hare International Airport. (iStock)

United Airlines stated that no serious injuries were reported. Chicago PD said the incident is under investigation by police and the FBI. 

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"The FBI is aware of an incident at O'Hare Airport this morning. There is no current threat to the public at this time," a Chicago FBI spokesperson told Fox News Digital.

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Fox News Digital reached out to Resurrection Hospital for comment but did not hear back in time for publication.