Arson investigations are underway into three fires in four days, Petaluma police and firefighters said Saturday.

A fire about 4:44 a.m. Monday consumed a portable toilet near the soccer field at Lucchesi Park and threatened a shipping container with property belonging to the Petaluma Youth Soccer League, fire officials said.

At 1:47 a.m. Friday, a parks department maintenance building on Maria Drive was found fully engulfed in flame five minutes after it was reported, officials said in a news release.

At 10:03 p.m. Friday, a third fire was reported near the Lynch Creek Trail and west of U.S. Highway 101. A 33-year-old man, Alexander Gasparyan, was detained for “reckless burning,” fire officials said.

Anyone with information on the incidents is asked to call Detective Alyssa Hanson at (707) 781-1291.

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Source: www.mercurynews.com