Detroit: The Detroit City Hall on Monday was evacuated on a report of a possible gunman in the building.
Police are reportedly searching for a man who may have a revolver inside the Coleman A. Young Municipal Center Downtown.
The government office building is on lockdown and has been evacuated due to the security breach.
According to the police, the man was a white man wearing a dark suit.
There have been no casualties or injuries reported.
The Coleman A. Young Municipal Center is located at 2 Woodward Avenue. It comprised of 20-story court tower and a 14-story administrative tower.