Interstate 88 westbound lanes remain shut down Monday evening in Maple Park for a police investigation, according to the Illinois State Police.

ABC7 Chicago was reporting that someone was shot and showed footage taken from above the scene of an officer standing near a red stain on the pavement.

ISP posted the alert about 3:30 p.m. Monday. A large police presence is in the westbound lanes along the interstate in Maple Park just west of Keslinger Road in DeKalb County at about 5 p.m.

The front window of a car along the shoulder appeared shattered, with debris on the ground.

When reached, ISP public information officer Sgt. Melissa Albert-Lopez said there was “an active investigation,” and authorities are still gathering details.

Eastbound lanes reopened as of about 4 p.m., though westbound lanes heading into Kane County are closed until further notice, ISP said. Illinois Route 47 ramps to I-88 westbound are also closed.

ISP asks motorists to seek an alternate route as drivers headed into Monday evening rush hour.

Traffic was reportedly at a standstill as far west as Peace Road in DeKalb.

When reached for comment, the DeKalb County Sheriff’s Office said the incident started in Aurora. The office said its deputies helped briefly Monday afternoon with traffic control.

This is a developing story. This story was updated at 4:50 p.m. and 5:18 p.m. and 5:48 p.m. Check back for further updates.

Shaw Local Reporter Megann Horstead contributed.