TAMPA - Election Day isn't even here yet, but we already have our first voting mystery.

Thousands of pages of voter information were found lying along the shoulder of Interstate 4 this morning.

The papers, all with information about Hillsborough County voters, have been cleaned up and taken to a Department of Transportation maintenance facility for now, but voting officials still don't know where they came from.

Transportation workers spotted the nine bags of documents on their traffic cameras along a ramp off I-4 and I-275.

The Hillsborough County supervisor of elections says it did not come from his office, but looks like it may have come from a campaign office or a grassroots effort which drives voters to polling paces. The documents contain names, addresses, phone numbers, and party affiliation, and if the voter needs a ride.

Transportation officials have called the Florida Division of Elections to see if the state office wants to investigate, and are waiting back for a response. If not, the plan is to shred the documents this afternoon.

Stay with FOX 13 for updates.