Seattle Fire Department evacuated around 100 people in Pioneer Square for a natural gas incident on Monday.
The leak investigation started around 2:30 p.m. on Monday near 4th Avenue and Yesler Way. People from four buildings were evacuated.
A hazardous materials team stopped the leak, but 4th Avenue was closed to traffic during the investigation.
SFD monitored air quality for normal levels before letting people back into buildings.