A rollover crash involving a semi and at least four cars closed lanes of Interstate 80 in south suburban Country Club Hills Friday afternoon.

Illinois State Police said the crash happened just after 5 p.m. in the eastbound lanes of the roadway at Kedzie Avenue.

Injuries were reported but it was not clear how many people were hurt and what their conditions were.

Major traffic backups were reported in the area.

Check back for details on this developing story.