NASHVILLE (AP) — The Tennessee Bureau of Investigation has obtained new accreditations for its forensic facilities in Nashville, Memphis and Knoxville.

The accreditations come after a lengthy assessment by the American Society of Crime Laboratory Directors' Laboratory Accreditation Board.

For the first time, TBI's facilities are now internationally accredited in breath alcohol calibration and crime scene processing.

Officials say the upgrade signifies the highest possible accreditation available to forensic laboratories.

All TBI laboratories were previously accredited in the disciplines of drug chemistry, toxicology and biology.