OCONTO FALLS, Wis. (AP) -- Wisconsin Attorney General J.B. Van Hollen says local authorities have taken a person into custody in a fire that caused extensive damage to a church school in Oconto Falls.

Van Hollen says the Division of Criminal Investigation is assisting, but an initial investigation indicates the fire at St. Anthony Parish School was not accidental.

The person's name was not released. No charges have been filed.

The fire sent billowing smoke clouds and flames through the roof Tuesday night. Sixteen-year-old Vince Enneper says he was walking home from the library and spotted the fire. The teen says he pried open a door and grabbed a fire extinguisher, but the flames were too intense.

WLUK-TV reports classes at St. Anthony have been moved indefinitely to Grace Lutheran Church in Oconto Falls.

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OCONTO FALLS, Wis. (AP) -- A fire caused extensive damage to a church school in Oconto Falls, canceling classes on Wednesday.

Fire investigators are expected at St. Anthony Parish School to look for a cause of a fire that sent billowing smoke clouds and flames through the roof Tuesday night. Sixteen-year-old Vince Enneper says he was walking home from the library and spotted the fire. The teen says he pried open a door and grabbed a fire extinguisher, but the flames were too intense.

Fire Chief Tim Magnin says the fire quickly spread, igniting ceiling tiles. Area fire departments were summoned to help.

WLUK-TV reports that although the school is closed, the adjacent church will hold Ash Wednesday services.