The FBI is investigating the mailing of several envelopes containing white powder in Marion County.

They're believed to be part of a spate in anthrax hoaxes around the country.

On Monday, local fire rescue teams responded to schools, churches, libraries, a day care center, funeral home and the county elections office. All had received suspicious envelopes. Similar mailings are expected to be delivered on Tuesday.

Marion County Fire Rescue spokeswoman Heather Danenhower says it appears the envelopes were sent by the same mailer, using what's believed to be a fake Ocala return address and the name Osama bin Laden, which was misspelled.

Authorities say an envelope mailed to The Gainesville Sun on Monday appeared to contain flour and was not hazardous.