Video shows one of the suspects holding a gun inside the BP station on Webster Avenue Monday morning.
Police say they stole a chain and bracelet from a customer before one of the suspects opened fire, hitting a 48-year-old security guard in the foot.
The suspects drove off in a red Mercedes-Benz sedan.
Police are asking for the public's help tracking them down.
Call the NYPD's Crime Stoppers Hotline at 1-800-577-TIPS (8477) or for Spanish, 1-888-57-PISTA (74782). You can also submit tips by visiting the CrimeStoppers website at crimestoppers.nypdonline.org or by messaging on Twitter @NYPDTips.
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