YUKON, Oklahoma - Two people are dead following a crash involving a semi and a car in far northwest Oklahoma City, Wednesday afternoon.

First responders were called out to the scene near NW 122nd Street and N. Piedmont Road (State Highway 4). From the air, it appears the vehicle, possibly a black Cadillac sedan, rear-ended the semi, heading southbound on Piedmont Road.

A medical helicopter was requested at the scene, but was later called back when it was determined that neither victim, both males, had survived. So far, police have not identified either victim.

The cause of the crash is under investigation.

Officials have shut down NW 122nd Street and Piedmont Road in the area while crews work the scene.

This is a developing story.

Keep checking with News 9 and News9.com for more information.