WHITTIER (CBSLA) – The clerk of a Whittier 7-Eleven was fatally shot Saturday morning during what police believe was an attempted robbery.

Police were called to the scene of the shooting around 5:43 a.m., where they found the clerk, who police say was in his 20s to 30s, suffering from a gunshot wound. Paramedics pronounced the clerk dead at the scene.

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Police said preliminary information indicates that the suspect entered the store, located at 8438 Santa Fe Springs Road, with a semi-automatic handgun with the intent to commit a robbery.

Surveillance photos posted on the Whittier Police Department’s social media show a man wearing a gray hoodie under a black hoodie, with a black bandana covering his nose and mouth. He was wearing black gloves. The suspect was described as a black man about 5-feet-7 inches tall.

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It is unknown why the suspect fired the handgun, killing the clerk.

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Two customers were inside the store at the time of the shooting. Both were uninjured, police said.