The rubble smelled of propane, and neighbors believe caused the explosion that followed an alleged arson fire.
The San Francisco Fire Department said the fire is “under investigation.”
According to the San Francisco Examiner, the incident occurred in one of about 15 in an illegal encampment called “Box City,” along Seventh Street, by Irwin Street. But by 10 a.m., the other boxes were gone, too.
On Thursday morning, San Francisco Public Works crews brought a front loader — which looks like a bulldozer — to Box City, where wooden boxes about 5 feet by 5 feet serve as de-facto homes for the formerly homeless.
Though most boxes survived the fire, Public Works dismantled at least 10 of the remaining box homes.