A 22-year-old man was sentenced to five years in prison for setting a fire earlier this year at the former Blue Heron paper mill in Oregon City.

Christian Gannon Dukes pleaded guilty Thursday to arson in the first degree. Other charges were dismissed as part of a plea agreement, the Clackamas County District Attorney’s Office said in a statement.

In March, fire inspectors posited that “makeshift stoves” used by homeless people may have caused the blaze that tore through a three-story industrial building on property now owned by the Confederated Tribes of Grand Ronde. Fire officials at the time said there wasn’t enough evidence to say whether the fire was ignited for warmth or cooking and then accidentally spread or was set with the intent to cause damage.

But Dukes admitted in his ple

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