arson (n)

The school was destroyed in an arson attack.
The investigators concluded that the fire at the old warehouse was a result of arson, as they found evidence of accelerants and deliberate ignition.
The local news reported a series of suspicious fires in the neighborhood, and the authorities were concerned that arson might be at play.
Arson is a serious crime, and those found guilty of intentionally setting fires can face severe legal consequences, including imprisonment.