US Marshalls helped arrest 13-year-olds Logan Heath and Ronald Jones and 14-year-old Wyatt Valle in Las Vegas Monday.
Over the weekend, Las Vegas police recovered the victim's car and arrested 17-year-old Pete Spray.
A threat on Facebook claiming to be from the teens put parents and students at Wilson Middle School on high alert Monday. It claimed the teenagers were going to "shoot up the school."
Exeter police weren't able to connect the threats to the suspects. But district officials tell Action News, they didn't want to take any chances and sent out a district-wide message to parents.