CHICAGO (WLS) -- Four people were shot and wounded Wednesday afternoon outside a day care center on Chicago's South Side, police said.Police said the shootings took place in the 5400-block of S. Loomis around 2:15 p.m. At least eight shots were fired between two cars on the street in front of the day care.Stray bullets blew out a window in the front door of the day care and several penetrated a wall and entered a room where children ranging from six months to six years old were taking a nap, according to a daycare worker. No children were injured; approximately 60 were in the building at the time of the shooting."The kids were napping so they were down low. Thank God everyone is safe," said Lafrancine Rizk, mother of one of the children.Parents picking their children up were shaken."It's unacceptable. It's unacceptable. Children could have got hurt. Children could've been killed. We can do better than this," says Kevin Nieves, who had a child in the day care center."I'm stunned," said Glennetta Jackson, who was picking up her granddaughter. "I actually have a headache. It really scared me because when I couldn't come through to come get her, and they had to detour me, and I seen the yellow tape-when you see the yellow tape you just think of something bad, something tragic. My first instinct was that something happened in the school.""I thought somebody was banging," Jackson's granddaughter said. "I thought somebody was banging with a drum. But I didn't know who was doing it until my teacher, Ms. June, told me."Police say the injured men were all in one car and drove themselves to Holy Cross Hospital, police said. One 24-year-old man was shot in the left hand, one 21-year-old man suffered a graze wound to the wrist, one 18-year-old man was shot in both arms, and one 21-year-old man is in critical condition after being shot in the chest, according to police.