By Syma Chowdhry

PHILADELPHIA (CBS) — Police are calling him a serial robber targeting stores in the Northeast.

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In less than a month, the suspect has hit six stores.

The latest robbery took place Sunday at this Rite Aid pharmacy on Oxford Road.

Police released surveillance videos hoping to catch the suspect, who doesn’t make a scene.

Lt. Stanford says, “He tries to do it in such a discreet manner where the average individual won’t notice that he is even robbing a store.”

All six incidents happened during the day with customers inside.

Stanford adds, “He is probably using this so he has an opportunity to blend in.”

The suspect lures an employee in an empty aisle by asking for help finding a product.

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He then tells them he has a gun and orders them to the stores safe.

“No one has ever actually seen a gun in any of these incidents but we want to get this off the streets before he had an opportunity to show a gun or harm someone.”

In total, the suspect has taken nearly $74,000.

Customers we spoke with say they will keep their eyes open.

Claudette Arter says, “I think I will be even more alert now. All the time, all the time, I watch my surroundings.”

Police are asking for the public’s help.

If you have any information, contact police. A $2,500 reward is being offered in this case.

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