Outbound lanes on the Eisenhower Expressway (I-290) in Oak Park were shut down for hours early Friday morning for a possible shooting investigation, with photos and video from the scene showing multiple police vehicles lining the roadway and officers canvassing the lanes.

NBC Chicago traffic reporter Kye Martin said the incident started about 2:40 a.m. Troopers could be seen walking in all lanes between Austin and Harlem as traffic backed up.

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 It's clear that officers are canvassing all lanes of the outbound Ike, looking for evidence of some sort,  Martin said.

Video captured at the scene showed at least six police vehicles parked across the expressway, with tow trucks close behind. As many as nine troopers carrying flashlights could be seen walking across all lanes.

As of 6 a.m., Total Traffic   Weather Network said lanes had reopened, but traffic and delays remained.

The Illinois State Police did not immediately respond to NBC Chicago's request for information.

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Reports of a shooting shut down the same area on the Eisenhower Expressway Thursday afternoon, with police blocking several lanes of I-290 near Harlem Avenue.

This story will be updated as more details become available.

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