(KRON) -- Traffic on westbound Interstate 80 was slowed Tuesday night after four vehicles were involved in a crash in El Cerrito, California Highway Patrol said. The crash happened at about 6 p.m. east of Cutting Boulevard. All lanes were blocked initially. As of 7:30 p.m., three lanes are blocked. 3 injured after multi-vehicle crash in Sunset District: SFFD The crash involved two sedans, one SUV and an SFO shuttle bus. Only one person had injuries, and they were not life-threatening. CHP is investigating the cause of the crash, and speeding is possibly a factor. CHP was working to tow the vehicles Tuesday night. CHP does not expect all lanes to reopen until after 8:40 p.m.