The explosion took place around 7:30 a.m. in the basement at 1010 Second Avenue, Sgt. Art Campa said.
The victims were doing some kind of work in the basement, but it wasn't immediately known if it involved the transformer, Campa said.
The three were taken to UCSD Medical Center, he said.
Rep. Duncan Hunter, R-Alpine, and his wife, Margaret, who were indicted on charges they used more than $250,000 in campaign funds on personal expenses returned to court for a status conference Monday.
A San Diego family is pleading for the public’s help after their loved one received a devastating diagnosis while living abroad in Indonesia.
A man was taken to a mental health facility Monday, several hours after a SWAT team responded to a gunshot fired inside a home in the Birdland area, officials said.
Temperatures remain cool Monday, warming through Thursday. Marine layer will stick around in the mornings, developing quickly overnight for the next few days.
The county Medical Examiner's Office will investigate the death of a man found on a sidewalk Sunday near a gate to the U.S. Navy Training Support Center, a city police officer said.
A downtown San Diego high-rise condo complex was evacuated early Sunday morning due to a water pipe bursting.
California officials quickly determined an arsonist started last month's huge wildfire southeast of Los Angeles, and that two weeks earlier sparks from a vehicle produced a deadly wildfire in the far northern part of the state.
The showdown begins Monday between the Trump administration and a handful of states opposed to relaxing fuel economy standards .
A 37-year-old man riding a bicycle was hit by a vehicle, seriously injured, and the driver sped off, officials said Sunday.