A Northwest Iowa High School was locked down Thursday following aconfrontation between three students that required intervention by theWoodbury County Sheriff’s department. Lawton-Bronson Superintendant BobRayner says the school took the extra security measures after one of thestudents made a threat.to get a gun and return to the school. The school then instituted its crisismanagement plan. Rayner says they decided the threat was serious enough totake action.16-year old Joshua Mitchel of Lawton was arrested for allegedly making thethreat about the gun. 18-year olds Jeremiah Heck and Richard Huss of Bronsonwere also arrested for their role in the incident. Rayner says the studentswill face disciplinary action from the school district.All three have been suspended pending further action by the school board.Authorities are not saying what spurred the confrontation between the threestudents.