Explosion blows off PG&E manhole cover

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.

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

Drivers should expect traffic delays in the area. PG&E was on scene shortly before 9:15 a.m.