SAN FRANCISCO (CBS SF) — A manhole cover blew off a PG&E vault in San Francisco’s Financial District Wednesday morning, according to fire officials.

The explosion was reported in the area of 350 Bush St. shortly before 8:30 a.m., according to the fire department.

READ MORE: Fawn Fire Update: 'I See My Life Gone'; Thousands Forced To Evacuate; Arson Suspected As Blaze Burns Homes

Smoke was visible initially but no fire was seen and no injuries have been reported.

READ MORE: UPDATE: Early Morning Crash Shuts Down Lanes On San Francisco-Oakland Bay Bridge

PG&E was on scene shortly before 9:15 a.m. While there were some traffic delays in the area, PG&E and San Francisco Fire Department crews were clearing the scene by shortly after 10:30 a.m.

MORE NEWS: 'Highway Slingshot Shooter' Fires Ball Bearings at Windows Along San Jose's Guadalupe Freeway

TM and © Copyright 2016 CBS Radio Inc. and its relevant subsidiaries. CBS RADIO and EYE Logo TM and Copyright 2016 CBS Broadcasting Inc. Used under license. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. Bay City News Service contributed to this report.