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Police say the employee was threatened that if he moved, he would be shot.
"One of the suspects took the clerk to the rear of the store, where he pistol-whipped him, told him not to move," said Lt. Bill Evans of the Norwalk Sheriff's Department.
While one suspect hit the victim with a pistol, another suspect tried to force his way into the cashier's booth, which activated the alarm, said Det. Gregory Guttierrez. The suspects fled and did not obtain any property.
The two suspects were described as black men between the ages of 18 and 22.
Anyone with information is urged to contact the Norwalk Sheriff's Station at (562) 863-8711.