parts of san francisco sfwleen chaos after 20 businesses got similar e-mails thursday morning. >> the types of businesses affected by the bomb threats range from officings, financial institutions, parking garage. >> sky 7 was over california street where police formed around the jewish community center where members were evacuated. >> i had a towel on my head and i ran out. >> the san francisco fire credit union called 911 and evacuated more than 100 employees. >> we received a call from an individual notifying us they had planted an explosive device. >> abc got the same e-mail. the sender demands bit county to guarantee everyone's safety. >> no suspicious devices have been found. >> you want that person arrested for making a terrorist threat. >> he says although the threats don't seem credible, they must be investigated. >> looks like an overreaction but it really isn't because what's law enforcement supposed to do but react and handle these things? >> the fbi says those responsible face federal felony charges and up to five years in prison if caught. >> cornell, thank you. we use th