ANACONDA, Mont. — Authorities in Anaconda say they have installed security cameras and changed the locks on doors but haven't named a suspect after someone last summer put urine in a coffee can at the Anaconda-Deer Lodge courthouse and days later spread feces on the coffee pot.

Two county employees drank the urine-tainted coffee on June 7, and feces was found on the coffee pot on June 11. A foam cup containing feces also was found in a closet.

Law enforcement officials tell the Montana Standard that workers at the state crime lab in Missoula couldn't get fingerprints off the cup, and the feces is not from a human so it wasn't tested for DNA.

Authorities say whoever contaminated the coffee could face a felony assault charge if caught.