BOISE, Idaho — Vandals slashed two tires and spray-painted the truck of Idaho's public schools chief as the furor over his proposed education reforms appeared to grow uglier.

Superintendent of Public Instruction Tom Luna said he woke up early Tuesday and found the word "Luna" painted on the truck with a slash through the letters.

"I'm not pointing any fingers at any individuals or groups, but there's no doubt in my mind" the vandalism involved the reforms, Luna told The Associated Press.

Nampa police were investigating and have not yet determined a motive or identified any suspects, Deputy Chief Craig Kingsbury said.