CHICAGO (WLS) -- Police hope surveillance video will help them find three armed robbery suspects.

They held up a 42-year-old man at gunpoint while he was out with a young trick-or-treater on Halloween.

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Police said it happened around 3:16 p.m. Friday in the 2600-block of South Emerald Avenue in Chicago's Bridgeport neighborhood.

Video shows a man help a little girl out of the back seat of an SUV as she holds her orange trick-or-treat bucket.

They pair start to walk across the sidewalk when an armed man runs up to them and points his gun at the victim's face. He then hits the victim in the head with the gun.

A second man runs up and begins taking the victim's belongings.

While all this was happening, a third man got into the vic

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