Updated 02/20/13 – 11:43 a.m.

CHICAGO (CBS) — Spider-Man is supposed to catch the crooks just like flies, not be one himself.

But a man wearing a blue and red Spider-Man mask entered a Northwest Side convenience store twice in the past month, and robbed the bank at gunpoint.

Police said the man, wearing a hooded sweatshirt and a Spider-Man ski mask, robbed the 7-Eleven in the 2700 block of North Harlem Avenue in the Montclare neighborhood about 5 a.m. on Tuesday, according to a community alert from Grand-Central District police. The same robber held up the same store on Jan. 24.

In both robberies, he displayed a handgun and demanded money from the register.

Police had only a vague description of the suspect, but were warning nearby businesses to be on the alert.

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