A North Dakota man is accused of spewing death threats against Barack Obama and breaking into a National Park Service historic site, where he allegedly terrorized a worker with a fire poker, according to police.

Ian Patrick Stewart, 36, is charged with felony burglary, damage to property of the U.S., terrorizing, malicious mischief, threatening to kill a former U.S. president and three counts of threatening interstate communications for his alleged crimes, according to his federal indictment.

Between April 20 and May 13, Stewart “knowingly and willfully” threatened to kill and inflict bodily harm on the 44th president and at least three other people. He capped off his threat spree with the fire poker raid at the Fort Union Trading Post in Williston, according to local CBS affiliate KXNET.

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An employee at the fort reported Stewart to police after being approached by him. They said he was wielding the fire poker and forced her away from the fort, per KXNET.

Authorities reportedly showed up and took Stewart into custody, but not before he allegedly threatened to “burn” the fort down and destroy artifacts that are inside.

According to his federal indictment, Stewart entered the fort at a time when it was not open and barricaded himself inside.

He is accused of sending threats against Obama and three others via “interstate and foreign commerce email and telephone communications,” the indictment says. The other individuals are all from Williston.