Thursday's natural gas fire, which sparked a bit before 6:30 p.m. on Thursday, originated from a Pacific Gas and Electric Co. gas line. PG&E President Chris Johns, according to the Chronicle, "came to the scene Thursday night, told reporters hours after the blast that the cause was under investigation." PG&E also stated that, if the cause of the explosion is their fault, they will take full responsibility.

But. During the hodgepodge of man-on-the-street interviews, several eyewitnesses explained that PG&E allegedly knew about a reported gas leak for a week and did nothing.

San Mateo Assemblyman Jerry Hill, according to reports, "said he was 'outraged' to learn that some residents had complained to PG&E about gas leaks in the neighborhood 'for up to three weeks' before the explosion."

The pipe in question was installed in 1948.