About 20 people were evacuated in San Mateo this morning as crews sealed a small gas line break, a PG&E spokesman said.
The people were evacuated from buildings in the area of West 20th Avenue and Alameda de las Pulgas after the gas line break was reported at 10:25 a.m., PG&E spokesman Jason King said.
A construction crew hit a 1.25-inch plastic gas line with an excavator there, causing the leak, King said.
PG&E sealed the gas leak at about 10:50 a.m. and the evacuations were lifted, he said.
There were markings on the ground where the underground gas lines were and PG&E is investigating why the crew hit the line despite the markings, King said.
"It's important to not only call 811 but to follow the safe digging instructions provided," he said.
PG&E expects to complete repairs to the line by mid-afternoon, King said.
No customers lost service because of the rupture.