Hazardous materials investigators are responding to San Pedro where a big rig containing lithium-ion batteries flipped over, trigging a partial closure of the 47 Freeway in the Long Beach area, authorities said.

A hazardous fire broke out in San Pedro around noon on Thursday after a big rig carrying lithium ion batteries overturned, causing at least one battery to explode, authorities said.

SAN PEDRO, Calif. - Traffic is backed up on the 47 Freeway in San Pedro Thursday afternoon as firefighters battle a blaze set off by a big rig truck carrying lithium-ion batteries. According to the Los Angeles Fire Department, the crash was reported just before noon in the 900 block of North Seaside Avenue.

A big rig containing lithium ion batteries overturned in San Pedro Thursday afternoon, sparking a fire that reportedly led at least one battery to explode. Gil Leyvas reports for the KTLA 5 News at 3 on Sept.