Windsor police are investigating vandalism to 13 Sharp Bus Lines school buses.

Sharp's Shop Foreman, Dale Minnett says "a driver was going on a charter, got in his bus and noticed his bus was damaged."

Minnett tells CTV Windsor some of the buses had all of the side windows broken, others had the safety arm snapped off, some windshields were shattered and rear door glass panes completely destroyed.

He add vandals even got into one of the buses and sprayed a fire extinguisher.

“So the bus is kind of a white, yellowey powdered colour that is terrible to clean," says Minnett.

While replacing the windows is a fairly quick process, Minnett adds the cleanup is more time-consuming because the glass "gets everywhere, every seat, we had to flip every seat up, vacuum, clean."

Minnett says it’s too early to know how much money this damage has caused but he estimates he and his mechanics have replaced 100 panes of glass so far.

The buses were all parked in the company’s lot at the former Windsor Racetrack off Ojibway Parkway.

Minnett says there are no security cameras because there is no power in the area.

It’s believed the incidents took place between 10 a.m. Saturday and 8:30 a.m. Sunday.

Anyone with information is asked to contact Windsor Police at 519-255-6700 ext. 4350, Crime Stoppers anonymously at 519-258-8477 (TIPS) or online at www.catchcrooks.com.