A local sheriff has been charged with murder in the fatal shooting of a Kentucky judge who was killed in his chambers on Thursday, according to police

District Judge Kevin Mullins, who presided over Letcher County, was shot and killed at the Letcher County Courthouse, Kentucky State Police said.

Letcher County Sheriff Shawn Stines has been arrested and charged with murder in the judge's death, state police said.

The Letcher County Coroner confirmed to ABC News the name of the victim and that the death occurred at the courthouse.

There are no reports of any additional injuries in the incident, Kentucky State Police Trooper Matt Gayheart told Johnson City, Tennessee, ABC affiliate WJHL.

A motive remains under investigation, he told the station.

"It is an isolated incident, and there is no threat to the public right now," Gayheart told WJHL.

Kentucky Attorney General Russell Coleman said his office will collaborate with the Commonwealth's Attorney for the 27th Judicial Circuit, Jackie Steele, as special prosecutors in the case.

"We will fully investigate and pursue justice," he said in a statement.

The Kentucky Court of Justice said in a statement Thursday it is in contact with law enforcement agencies, including the Kentucky State Police, "and are offering our full support during this difficult time."

"While the investigation is ongoing, we are committed to providing assistance in any way that we can," the statement continued. "Our deepest sympathies go out to all those impacted by this tragic event, and our thoughts and prayers are with the community during this challenging time."

The courthouse will be closed on Friday, according to an order by Letcher County Judge/Executive Terry Adams.

Mullins had served as district court judge for Kentucky's 47th District Court, which presides over Letcher County, since 2009, when he was appointed by then-Gov. Steve Beshear.

He was a graduate of the University of Kentucky and earned his law degree from the University of Louisville.

This is a developing story. Please check back for updates.