The vast majority of residents evacuated from their San Pablo homes were allowed to return late Thursday night after bomb squad technicians made significant progress removing a massive and volatile stockpile of homemade chemicals.
A bomb squad is investigating hundreds of boxes with several hazardous materials found Wednesday afternoon in a San Pablo backyard shed, Contra Costa fire officials said.
A bomb squad began investigating hundreds of boxes with several hazardous materials, including some explosives, found at the home of a late UC Berkeley chemist on Wednesday afternoon in a San Pablo backyard shed.