Two people shot Tuesday morning in DuPage County near Glen Ellyn have refused to cooperate with investigators.

About 10:50 a.m., DuPage County Sheriff’s Office deputies responded to Route 53 and Butterfield Road for a report of gunshots, the sheriff’s office said.

Deputies found shell casings and determined that someone fired shots from a dark-colored Ford sedan into another vehicle after pulling out of the parking lot of a nearby Walmart Supercenter, authorities said.

Two men, ages 20 and 22, were struck by bullets and took themselves to a hospital without reporting the incident, the sheriff’s office said. Neither would cooperate with investigators. They have since been treated and released.

Anyone with information was asked to call the sheriff’s office at (630) 407-2400.