NEWAYGO, Mich. (AP) — A man whose son accidentally detonated an explosive at a western Michigan school was charged with illegal possession of destructive devices, authorities said Monday.

An indictment unsealed in federal court accuses David Saylor of possessing unregistered explosive devices and a stolen firearm.

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In March, Saylor’s son brought a homemade explosive to Newaygo High School and accidentally detonated it, injuring himself and others, authorities said.

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Police immediately searched the man’s home and charged Saylor in a local court with contributing to the delinquency of a minor and manufacture or possession of a Molotov cocktail.

An email seeking comment was sent to Saylor’s attorney.

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