The shooting occurred about 2 a.m. Monday on County Road 717, a quarter mile west of U.S. Highway 75 and about 5½ miles northeast of Humboldt.
The Richardson County Sheriff's Office says Deputy Joshua Nincehelser noticed a stopped car and approached to offer aid. Nincehelser reports that the driver soon pulled a pistol and fired several times. Nincehelser returned fire and then gave chase as the car sped away.
The office says the chase stopped when Nincehelser couldn't see through his bullet-shattered windshield and realized one of his arms had been hit. He was being treated at a Lincoln hospital.
No arrests have been reported.