Police said the stabbing happened inside a Logan Square business in the 2200 block of North Milwaukee Avenue at about 6 p.m.
A male offender, whose age was not immediately known, entered the business before taking out a knife and stabbing a 25-year-old woman, police said. Police said the victim, stabbed in her chest and both legs, was transported to Illinois Masonic Hospital in critical condition.Police did not immediately provide further information about the stabbing.