Carroll University in Wisconsin briefly went into lockdown mode today after a man was spotted with a gun near its tennis courts, the Milwaukee Journal-Sentinel reports. The suspect was described as a man in a brown jacket and black hat in his 50s. The lockdown began at 11:15am and was lifted just after noon. A local news helicopter spotted police taking someone into custody, TMJ 4 reports. It's unclear if the man they apprehended was connected with the lockdown. A university spokesman said the school would remain closed for the rest of the day.