Smoke coming from an underground vault in San Francisco’s Financial District this afternoon apparently came from smoldering insulation on a cable, a PG&E spokesman said.
Firefighters responded at 2:23 p.m. to reports of smoke and flames coming from underneath a maintenance hole cover at 505 Montgomery St., a fire official said.
PG&E crews also responded to the scene, where the fire was quickly put out, PG&E spokesman Joe Molica said.
Molica said an investigation found a small power cable in the vault had smoke coming from it but said crews do not know what may have caused the smoke.
No one was injured in the incident, which briefly shut down Montgomery Street between Sacramento and Clay streets, he said.
All lanes reopened shortly afterward, although one remained closed so crews could continue to investigate the incident, he said.
Dan McMenamin, Bay City News