PHILADELPHIA (CBS) — Philadelphia Police hope you can help them track down an armed robbery suspect, caught on camera.

Surveillance video shows the suspect walking into a shop on the 2400 block of Memphis Street last Thursday, around 11:15 a.m.

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Investigators say the suspect threatened a 20-year-old female clerk with a knife and got away with cash.

If you recognize the suspect, please contact police right away.

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Credit: CBS3