Construction crews struck a large gas line, shutting down a section of 4th Avenue near the public park being built near Horton Plaza.
San Diego Fire-Rescue responded to the corner of 4th and Broadway directly across from the U.S. Grant Hotel and the NBC Building around 8 a.m Tuesday.
San Diego Gas & Electric crews were also called to the scene.
A fire engine blocked traffic along 4th Avenue from crossing Broadway into the Gaslamp area.
Firefighters cordoned off a nearby sidewalk to foot traffic as well.
In less than an hour, crews had the leak capped.
