City fire is on scene at North Street and Chandler Avenue, the site of a natural gas leak.
The call originally came in from UMMC as a report of a natural gas smell in the hospital, but the strongest concentration of the odor turned out to be at Chandler and North, where construction is taking place.
A two-inch line was struck, but workers didn't want to shut off the gas because many of the older homes in the area have pilot light systems that would cause the houses to fill with gas.
The leaked gas was apparently being picked up by the hospital's HVAC system, so the hospital has switched to recirculated air until the problem is mitigated.
National Fuel is on scene.