The FBI and police in Florida are investigating after a tunnel was discovered under a road leading towards a bank.

FBI spokesperson Mike Leverock said officials were notified after a motorist reported what looked like a sinkhole in a street near a Chase Bank branch in suburban Pembroke Pines.

"I saw something like this in the movies, however this hole is so small that it's unique," he said.

Investigators found an entrance hole in a nearby wooded area that contained a small electric generator, a winch and some electrical cords.

The tunnel led under the road toward the bank, a distance of about 45 metres.

A cadaver dog determined there were no bodies inside the tunnel.

It was not immediately clear how long the underground structure had been there.

There was no robbery at the bank and no arrests have been made.