Authorities say at least one of two suspects who stole a police car during a traffic stop has been shot dead in Central Texas.

The Texas Department of Public Safety says the two suspects assaulted an officer Tuesday evening as he tried to arrest them in Italy, about 50 miles south of Dallas. The department said in a news release that the pair stole his patrol car and a chase ensued.

The suspects stopped but refused requests to surrender.

The department says officers heard a gunshot inside the police vehicle, then shot the driver who emerged from the car carrying a firearm. That suspect's condition was not known.

The second suspect was found dead inside the patrol car.

The assaulted officer is being treated at a hospital.