SAN FRANCISCO -- Power has been restored to all 8,600 customers who lost electricity after an underground explosion and fire.

Pacific Gas and Electric said the blast occurred around 11:30 a.m. Friday. Police cordoned off a two-block area, and firefighters sprayed foam into the manhole.

There were no reports of injuries.

Andrew Souvall, a spokesman for PG&E, says the final few hundred customers still without power on Saturday had it restored just after 6 p.m.

After the fire on Friday, authorities advised people in the area to stay inside for several hours and residents complained of a horrible smell.