The incident occurred at the One Stop Food and Liquor Store in the 1000-block of Fairfield Road at about 10:45 p.m.
Police said 16-year-old boy and a 20-year-old woman entered the store and ordered employees to get behind the counter. Police said one of the employees was able to get a gun and shot both of the suspects.
The suspects then fled in a car north on Fairfield Road and eventually went down a dead-end road.
Police located the vehicle with the two wounded suspects inside. The boy, 16, was treated at the hospital and released into police custody. He has been charged with armed robbery and taken to a juvenile detention facility.
The woman is hospitalized at Condell Hospital in Libertyville with non-life-threatening injuries.
A driver and passenger who were also in the vehicle fled the scene and are not in custody, police said.