A manhole cover explosion in downtown San Francisco Tuesday evening was caused by an underground vault fire, a PG&E spokesman said.
The manhole cover blew at about 5 p.m. near the corner of Third and Mission streets, according to the San Francisco Fire Department.
No injuries were reported, but streets were closed down in the area, PG&E and fire officials said.
The fire was quickly extinguished, and PG&E was alerted to the fire at 5:14 p.m., PG&E spokesman J.D. Guidi said.
PG&E crews confirmed the fire was caused by an underground PG&E equipment failure.
The fire did not cause any power outages in the area and no customers were impacted, Guidi said.
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