CASEYVILLE, Ill. (KMOX) -  A semi hauling cattle to market overturned early Monday, resulting in dozens of cows falling onto I-64 and major traffic headaches for Metro East commuters.

It happened around 1:30 a.m. as a livestock truck flipped over in the westbound lanes of 64 near the I-255 interchange.

State police say three animals had to be shot after making their way onto traffic lanes of I-255.

** Also read: PETA Unhappy About Cow Deaths After I-64 Crash

The driver of the cattle truck had minor injuries, as did a person driving a passenger vehicle that was also involved in the crash.

It took several hours for crews to round up about five dozen cattle and tow the overturned truck from the scene.