Pima County Sheriff's deputies working an incident in the area of Aviation Parkway and East 34th Street on October 04, 2017.

A man who apparently took a hostage during a carjacking was shot during a confrontation with sheriff's deputies on a busy Tucson road.

A deputy fired one shot at the gunman, but it wasn't clear if the gunman shot himself, authorities said Wednesday afternoon.

The incident began with a carjacking report at about 1:30 p.m. in the 5000 block of East Valencia Road, which turned into a chase involving DPS troopers on Interstate 10.

About 15 minutes later there was a report of another robbery/carjacking at a house in the 4100 block of East Dover Stravanue, said Deputy Cody Gress, a sheriff's department spokesman.

At some point, deputies caught up to the vehicle at South Catalina Avenue and East Drexel Road and a chase began, Gress said.

There were two men inside the car, the gunman and an apparent hostage. The gunman was driving and pointing a gun at the other man and also pointing the gun at law enforcement officers.

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The vehicle stopped on East Aviation Parkway near East 34th Street when the gunman got out of the car and was confronted by deputies.

The man had a gun and a shot was fired, Gress said. He said a deputy fired one shot, but there is also a possibility the gunman shot himself, Gress said.

The gunman was wounded and transported in unknown condition to Banner-University Medical Center, where he was in surgery. The hostage was also taken to a hospital to be checked out by doctors for precaution.