Shares of WFC are off 0.7% after hours.
A search warrant that the paper obtained shows that the state's Justice Department is demanding information including the names of California customers who had unauthorized accounts opened up, info about fees tied to those accounts, and the name of employees who opened them as well as their managers, along with e-mail and communications.
It's also requesting info about customers in other states, if accounts were opened by Wells Fargo workers in California.
The agency says there's probable cause to believe the bank violated two sections of the state penal code, both felonies. But it's not yet clear whether Attorney General Kamala Harris and her office will pursue charges against individuals or even the bank yet.
Wells Fargo says it's "cooperating in providing the requested information."