ALERT CENTER: Hazmat team called to Bridgeport office building after person suspected of leaving substance

A hazmat crew was called to a Bridgeport office building Thursday after a dark-colored substance was discovered inside.
Bridgeport police, fire, the Connecticut Department of Energy and Environmental Protection and Fairfield County Hazmat were all dispatched to the building just after 2 p.m.  
Police say they received a 911 call that someone left a brown or black-colored substance inside of the office building.  
Officials reported that the area was contained and there is no health risk to the public.
Officials did not say what the substance was or where the location of the office building is.