Update: The Carson City Library has reopened. The cause of the fire was a burnt motor on an air conditioning unit.
The road is back open too.
The Carson City Library has been evacuated as the Carson City Fire Department investigates smoke inside the building.
The library, at 900 North Roop Street, was evacuated about 10:15 a.m.
Carson City Fire Chief Sean Slamon said there are no flames visible but an investigating is ongoing.
The crews are checking the HVAC system as a potential cause.
William Street and Washington is currently closed.