CHICAGO (CBS) — A liquor store employee is dead after being stabbed on Saturday inside a business in the Brighton Park neighborhood.

Around 12:30 p.m., the 56-year-old man was working in the Liquorama store in the 4000 block of South Kedzie Avenue when a suspect came up and tried to buy alcohol, police said.

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The clerk refused to sell to the suspect after the suspect would not show his ID, police said.

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They got into a quarrel, and the assailant pulled a knife and stabbed the victim four times in the torso, police said.

The victim was taken to Mount Sinai Hospital, where he was pronounced dead, police said.

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Area Central detectives were investigating Sunday afternoon. The suspect was arrested a few hours later at his home and was being questioned late Saturday, police said.