Authorities in eastern Tennessee were searching early Friday for a suspect they say was involved in a shooting that killed one sheriff's deputy and left another wounded.

Warrants have been issued for 42-year-old Kenneth Dehart, who is wanted on suspicion of first degree murder, attempted first degree murder and being a felon in possession of a firearm after the Thursday evening shooting, Blount County Sheriff James Lee Berrong said in posts on the department's Facebook page.

Deputy Greg McCowan was killed in the shooting during a traffic stop. A female officer was shot in the leg and returned fire. She was being treated at a hospital, Berrong said.

"This is the hardest thing I've ever done. We had an officer killed tonight," Berrong said during a news conference in which he was visibly upset. "I'm so sorry that we've lost a young man. I talked to his family earlier. I apologized for not protecting him."

A $10,000 reward has been offered, Berrong said.

"We're going to get this man off the streets of east Tennessee and put him behind bars," he said.

Multiple law enforcement agencies were involved in the hunt for Dehart, who shouldn't be approached if spotted, the sheriff's office said.

The Tennessee Bureau of Investigation was among the other agencies:

The TBI has added Dehart to its Most Wanted list, CBS Knoxville affiliate WVLT-TV reports.

Dehart was last seen in the city of Maryville, the TBI said on social media.

Maryville is in Blount County and located about 17 miles south of Knoxville.