San Diego Fire-Rescue crews and San Diego police were in the process of evacuating 20 houses in Del Cerro Friday.
A gas main broke on Camino Largo at approximately 5:30 a.m.
San Diego Gas & Electric crews were on site.
A 2-inch distribution line has been damaged, SDG&E spokesperson Helen Gao said.
Crews were working to pinch the line on either side of the break.
Police have shut down the street to traffic.
Officials said initially they were evacuating three homes on either side of the break but within an hour they adjusted the number of homes affected to approximately 20.
No other information was available.
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