A man was arrested Monday after allegedly threatening violence against the UnitedHealthcare corporate campus in Minnetonka. The incident prompted a large police response to the building late Monday morning. Security at UnitedHealthcare has been heightened since its CEO, Brian Thompson, was fatally shot in New York last December. There were no reports of injuries stemming from Monday's incident in Minnetonka. The suspect remained in custody at the Hennepin County Jail as of early Tuesday, pending charges.