Oct. 21, 2006 -- Less than three weeks from Election Day, there are new questions about the security of electronic machines that will be used by millions of voters on Nov. 7. A former Maryland legislator says she received an anonymous package containing what appear to be secret computer codes used to run electronic voting machines in Maryland and other states. Some computer scientists say those codes could be used to change votes. The FBI is reportedly investigating. Diebold Election Systems, Inc., which makes the touch-screen machines, insists they are safe from tampering. But this is not the first time questions have been raised about these machines -- and Maryland's governor, among others, has grave doubts. ABC News is developing this story and will have a complete report this Sunday on "World News."