KANSAS CITY, Mo. (AP) — A 70-year-old Kansas City man has pleaded guilty to charges involving a hoax threat to contaminate water supplies in Kansas and Missouri.

The U.S. Attorney for western Missouri says Manuel Garcia pleaded guilty Monday. He admitted making three telephone calls to authorities in October 2013 about the fake plot to contaminate water supplies in Kansas City, St. Louis, Wichita and Topeka.

An FBI agent recognized Garcia’s voice from a 2010 case in which he was sentenced to 18 months in federal prison after pleading guilty to making a phone call threatening to bomb the U.S. courthouse in downtown Kansas City.

Garcia faces up to five years in federal prison without parole, plus a fine up to $250,000.