Federal and state authorities are trying to discern a Nevada man’s true intentions after they arrested him on the University of Washington campus, dressed in full body armor and transporting explosive devices and stolen firearms.

Justin Miles Jasper was arrested Thursday after a brief police chase near Seattle Children’s Hospital late on Wednesday, said John Vinson, head of the campus police, in the NBC report. Mr. Vinson only said the arrest was “high-risk,” but didn’t explain what that meant.

Mr. Jasper, believed to be 21 years old, was arrested on suspicion of possessing an incendiary device, NBC reported.

Authorities “have no idea what his intentions are,” Mr. Vinson said.

Police first came across Mr. Jasper on Tuesday, asleep in his truck. He was allowed to leave after police checked his criminal records and found nothing. On Wednesday, they learned the truck he was driving had been reported stolen in Montana, and they found him driving on the campus later that day.

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