A Lyft driver was arrested for aggravated assault after slashing a passenger's arm with a knife, according to the Chandler Police Department.

Police said James Dealchaezadaek, 39, drove Michael Kirkpatrick and another man from Scottsdale to the area of Frye Road and Arizona Avenue in Chandler late Sunday night.

Sgt. Joe Favazzo said Kirkpatrick got into an argument with Dealchaezadaek.

Dealchaezadaek, who was originally believed to have been an Uber driver, stopped the car in the parking lot of the Alta Steelyard apartment complex; the argument continued outside.

At some point, the argument turned physical. Favazzo said Dealchaezadaek pulled out a razor blade knife and slashed Kirkpatrick across his arm.

Kirkpatrick, 30, suffered a small cut and was treated at the scene.

Police arrested both men.

Detective Seth Tyler of the Chandler Police Department said Dealchaezadaek was booked into the Maricopa County Jail on suspicion of aggravated assault and disorderly conduct.

Kirkpatrick was booked on charges of criminal damage and disorderly conduct and then released.

An Uber spokesman said the company looked into the incident and determined that the suspect was not one of its drivers.

Both Uber and the Chandler Police Department later said Dealchaezadaek was a driver for Lyft.

Founded in San Francisco in 2012, Lyft has been operating in the Phoenix metro area since late 2013.

Editor's note: This story has been updated to report that the suspect, James Dealchaezadaek, was driving for Lyft, not Uber.

Copyright 2016 KPHO/KTVK (KPHO Broadcasting Corporation). All rights reserved.

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