A pair of dump truck drivers are facing charges in connection with the theft of crushed limestone worth thousands of dollars that was supposed to be delivered in the Florida Keys, authorities said.

Frank Quintana Marcos, 48, of Miami, is facing multiple charges including grand theft and scheme to defraud, Monroe County Sheriff’s Office officials said Wednesday.

The second driver, 35-year-old Manuel Antonio Periera Clara, of Hialeah, is facing similar charges but remains at large, authorities said.

Authorities said the men were supposed to deliver multiple 22-ton loads of crushed limestone to a construction project at the Florida Keys Marathon International Airport.

Between June and through August, the multiple loads of limerock weren’t delivered, leading to a loss of over $10,000 to the company doing work at the airport, authorities said.

Investigators said the drivers diverted the loads and falsified records to conceal the crimes.

Quintana Marcos was booked into jail on Tuesday.

Frank Quintana Marcos

Monroe County Sheriff’s Office

Monroe County Sheriff’s Office

Frank Quintana Marcos

The sheriff’s office is asking anyone with information on the whereabouts of Periera Clara to call them at 305-289-2430.