MASON CITY, Iowa – It happened on Pierce Ave. in Mason City, crews spent most of the day Sunday working on repairs.
A spokesperson from Alliant Energy tells us they shut off natural gas lines, which will affect about 630 homes.
They also tell us MCPD evacuated a few residents while they were working to repair the leak.
Crews will be working on repairs through Sunday night, and expect to start re-lighting first thing Monday morning.
At this time, Alliant tells us they still are working to figure out what caused the leak.