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.

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

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.

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.