The Brief Authorities are investigating two back-to-back mail thefts at the San Bruno Post Office, including a robbery where a postal worker was pushed and injured. The suspect or suspects targeted the loading dock, stealing tubs of mail that may impact residents in San Bruno and South San Francisco. Authorities are issuing a warning to Peninsula residents to check their bank accounts following back-to-back thefts at the San Bruno Post Office, including a robbery that left an employee injured. "Residents are encouraged to monitor their bank accounts, credit card accounts, and other financial statements for any unauthorized activity," San Bruno police said in a statement. "I have mailed bills here so I’m going to check my bills and check my statements, because this is pretty scary," said San Bruno resident Gabrielle Riste.