POSTED: Sunday, May 6, 2012 - 1:00pm
UPDATED: Sunday, May 6, 2012 - 1:04pm
NBC NATIONAL NEWS — Two California firefighters were injured late Sunday when an underground electrical vault exploded in Yorba Linda.
The firefighters were treated for minor burns and released after the explosions.
Power was returned to about 3,400 Southern California Edison customers Monday morning.
A captain and firefighter were walking toward a dislodged manhole cover after the second explosion when it exploded for a third time, according to fire officials.
Both were launched about ten feet into the air and suffered burns.
They were treated at Western Medical Center in Santa Ana and released.