Elections officials say boxes labeled with the words "provisional ballots" that have shown up around Broward County contain offices supplies used on Election Day and are not used to collect actual filled-out ballots.

Broward supervisor of elections attorney Eugene Pettis says the boxes contain office supplies and a red envelope for polling places to use for any provisional ballots. Provisional ballots are cast when someone votes without identification or their eligibility cannot immediately be verified by elections officials.

Pettis says provisional ballots are sealed inside the envelope and sent separately to the supervisor of elections' office. The box is then loaded with office supplies and dispatched to the same office but does not contain any ballots.

One such box found at an elementary school was opened for reporters. It contained only the office supplies.

Additional boxes were found late Sunday in the back of a returned rental car at the Fort Lauderdale airport. Broward Sheriff's Office spokeswoman Veda Coleman-Wright says deputies transported them back to the proper office.