Published: Jan 10, 2013 10:29 PM EST
Updated: Jan 11, 2013 11:10 AM EST

LEHIGH ACRES, Fla.- Thieves target a Lehigh Acres gas station and stole 619 gallons of diesel fuel. Even with new security measures in place the thieves figured out a new way to get  the fuel while employees had no clue.

Mohiuddin Jhonny manages the Shell gas station off Meadow road in Lehigh Acres. Yesterday when Jhonny was reviewing the gas logs, he  made a discovery that made him sick.

"Gallon wise we figured out we were like missing like 619 gallons at the time," he said.

619 gallons of diesel stolen and there was no record of a transaction on the computers.   

"I came to the pump and I was checking the pump and I found one of the pumps broken," said Jhonny.

Surveillance footage shows two 18 wheelers pulling in to the diesel pumps just after 10 pm Tuesday. Jhonny thinks the driver of the white truck is the thief because he blocks the cameras view of the pump by keeping his door open. After about 25 minutes both trucks drive off, meanwhile, the three employees inside had no idea.

Jhonny installed new locks on the pumps after crooks targeted him several years ago. He also invested in a new surveillance system, but the crooks were still able to break in to the pump and jhonny says they disconnected wires because they knew exactly what to do.

"After doing all those things, once again, they are coming up with new technologies and new things I don't know," he said.

The amount of fuel taken amounts to more than $2,400. Jhonny has to pay for that out of pocket and he says right now the store barely breaks even

"Making two thousand dollars on gas, it's not happening," he said.

The store does not have insurance on the diesel fuel.

Lee County Sheriff's Office is investigating.