LAWRENCE, Kan. (AP) — A suburban Chicago couple is behind bars and their five children are in protective custody after two of them were discovered blindfolded and with their limbs bound in the parking lot of a Walmart in eastern Kansas, police said Thursday.

Responding to a call from a concerned shopper Wednesday, police visited the store and spotted a 5-year-old boy sitting on the ground beside a large SUV with his hands tied behind his back, his legs bound and a blindfold covering his eyes. As an officer approached the car, he noticed a man standing near the vehicle.

"When (the man) saw the officer, he tried to get away from him," Lawrence police spokesman Sgt. Trent McKinley said. The man ducked inside the vehicle and the officer, concerned that the man could be reaching for a weapon, used a stun gun and put him in handcuffs, McKinley said.