CHICAGO (CBS) — A man was in critical condition late Sunday after being shot on Belmont Avenue on the city’s Far Northwest Side.

Around 3:05 p.m., two men were quarreling on the street in the 6400 block of West Belmont Avenue – just west of Narragansett Avenue on the cusp of the Schorsch Village and Montclare communities.

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The shooting reportedly happened at a Shell gas station.

One man took out a gun and fired at the other, striking him twice in the torso, police said.

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The gunman ran off in an unknown direction.

The 30-year-old victim was taken to Advocate Illinois Masonic Medical Center in critical condition, police said.

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Area North detectives were investigating late Sunday.