Investigating blaze: Welding accident explored as spark

SAN FRANCISCO (CBS SF) – Nearly 150 firefighters tackled a five-alarm blaze that burned at a building under construction in San Francisco's Mission Bay neighborhood Tuesday evening. BRE Properties, which focuses on development, acquisition and 

San Francisco Fire Department spokesperson Mindy Talmadge told AP the building was under construction, which made putting the fire out more difficult since fire suppression systems — such as water sprinklers — had not 

An apartment complex under construction near San Francisco's AT&T Park burst into flames Tuesday afternoon, leading to the partial collapse of the building. Over 100 firefighters are currently working to put out the blaze.

SAN FRANCISCO — San Francisco fire investigators on Wednesday were looking into whether welding work was to blame for a massive blaze that barreled through an apartment building construction site, threatening nearby buildings, prompting evacuations 

A massive, multiple-alarm fire in San Francisco's Mission Bay neighborhood burned for hours Tuesday, sending a plume of black smoke high into the sky. As of 6:45 p.m., firefighters had contained 50 to 60 percent