Illinois State Police were investigating shots fired early Sunday on the Eisenhower Expressway on the Near West Side.

Police were notified of shots fired about 3:45 a.m. in the inbound lanes of I-290 near Racine, according to Illinois State Police.

Shell casings were found, police said. No injuries were reported.

As of 6:35 a.m., all inbound lanes were closed to traffic in the area while police investigated, police said.