COLLIN COUNTY -- Law enforcement officials are investigating after a wife and husband were found dead inside their McKinney home.

At about 9:30 p.m. Sunday, the Collin County Sheriff's Office was called about a domestic disturbance at a home in the 2200 block of The Crossings Drive in the subdivision of Lowry Crossing, according to Captain Jim Moody.

When deputies couldn't reach anyone inside, the office's tactical team entered and found the bodies of Jimmy and Rosemary Blackburn. Officials say a small caliber handgun was found at the scene.

"Investigators have determined that this is an isolated event and there is no further threat to local residents," Moody said.

Their deaths are still under investigation.