Updated at 4 p.m.: Revised to include details from an arrest warrant affidavit.

An Uber driver was wounded when a gunman opened fire on a car early Tuesday on the edge of Old East Dallas, southeast of Lakewood Country Club.

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Officers arrived about 1 a.m. in the 100 block of South Brookside Drive, near Abrams Road, and found the Uber driver's vehicle with 10 to 15 bullet holes in its right front passenger door and window.

John Beaty

The gunman, identified as 33-year-old John Beaty, told police he'd seen someone he thought was committing a crime in the Uber vehicle before he started firing, WFAA-TV (Channel 8) reported. Investigators were looking into whether the gunman is a former soldier who may be suffering from post-traumatic stress disorder.

Beaty served in the Army from 2007 to 2010, according to government records.

The shooting may have been the result of a misunderstanding.

A man told police that Uber driver Al Aloosi came to pick him up. Aloosi, 24, saw a small case the man was holding and asked the man what it was. The man told Aloosi that it was a handgun, and the driver asked to see it so he could take a picture with it, according to an arrest warrant affidavit.

Aloosi's passenger released the magazine from the handgun and handed him the weapon, police said. The driver held the gun against the right side of his own face when multiple shots were fired into the car, according to the affidavit.

The passenger crawled out of the car and around the back side to get Aloosi out of the driver's door, police said.

That's when the passenger saw Beaty approach the car with a shocked look on his face and heard him curse, according to the affidavit.

Police said that when they arrived at the scene, they found Beaty kneeling over Aloosi to apply pressure to his gunshot wounds.

Aloosi told police that the "guy with the beard shot me."

The Uber driver had multiple wounds to the chest and possibly his abdomen, police said, and was taken to Baylor University Medical Center at Dallas. The injuries were not believed to be life-threatening.

Beaty was jailed on a charge of aggravated assault with a deadly weapon. His bail has been set at $75,000.