Thief holds up Avondale convenience store

A convenience store was robbed at gunpoint Friday morning in the Avondale neighborhood on Chicago's Northwest Side.

A gunman wearing a mask entered the store around 1:51 a.m. in the 3600 block of West Belmont Avenue and went behind the counter, police said.

The gunman began stealing items and fled through the back door, police said.

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No one was injured in burglary.

Area Five detectives are investigating.