RELATED: California bill passes PG&E fire liability on to customers
A group of Bay Area lawyers is suing PG&E, claiming it was negligent in properly inspecting and managing its power lines.
Investigators haven't determined how the fire started, but last week PG&E told state regulators it experienced a problem on a transmission line in the area of the fire just before it erupted.
RELATED: PG&E says if found responsible for Camp Fire, cost would exceed insurance coverage
The company says it's too soon to determine if sparks from a transmission line are to blame.
However, PG&E says if its equipment is responsible, damage costs would exceed the company's insurance coverage.
Company stock fell more than 25 percent Wednesday morning.
To read PG&E's filing to the Securities and Exchange Commission, visit this page.
For more stories related to the deadly Camp Fire burning in Butte County, visit this page.