It happened around 6 p.m. on November 11 on Eastern Parkway and Albany Avenue in Crown Heights.
Police say the group smacked a 14-year-old in the head and then knocked his yarmulke off the top of his head.
Investigators say the suspects then removed the fedora off the head of a 15-year-old and threw it on the ground.
Both teens were dressed in traditional Jewish clothing.
One of the teens was wearing a ski mask.
Anyone with information in regard to this incident is asked to call the NYPD's Crime Stoppers Hotline at 1-800-577-TIPS (8477) or for Spanish, 1-888-57-PISTA (74782).
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