A contractor's employee threw a rock at a copper thief's vehicle in Wantagh Wednesday morning, breaking a mirror, but he was unable to stop the theft, Nassau police said Thursday.

The employee at JM Electrical Contractors on Wantagh Avenue noticed a surveillance camera had caught a black Jeep Liberty speeding into the rear yard at 11:15 a.m., police said. A male got out and began loading several pounds of the company's copper into the vehicle, police said.

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When the employee approached, the suspect drove off, but not before the worker threw a rock at the Jeep, smashing a rear view mirror, police said.

Detectives request anyone with information on this grand larceny case call Nassau County Crime Stoppers at 1-800-244-TIPS.