Tooele police have arrested a couple, after they allegedly kidnapped a young boy -- from the man's former girlfriend -- early Thursday morning.

Authorities say Shawn Bergeron, 25, and Stephanie Goff, 22, were booked into the Tooele County Jail.

The boy, 4, was found -- uninjured, but scared -- about 90 minutes after he was taken.

The motive is unclear, though police say Bergeron had expressed concern about the way the boy's mother was caring for a medical condition he has.