CHICAGO (CBS)– A man was shot in Gresham after walking up to a car.

Police said the 18-year-old man was with a 21-year-old woman near 75th and May streets just after 9 p.m. Thursday. The two went up to a car they thought had a family member inside.

Instead, they startled a 22-year-old man they didn’t know.

Police said that man got out of the car, pulled out a gun and started shooting.

He hit the 18-year-old in his leg, sending him to the hospital.

Police said the shooter was arrested.