A quick-thinking motorist prevented a bloody mess on a Wisconsin street on Sunday, when he spotted and retrieved a box of donated human blood from the middle of the road.

"The good news is it was not struck by a car or truck, and was undamaged: good to go," Madison police said in their online incident report.

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A 68-year-old Stoughton, Wisc., man saw the box while driving, stopped to inspect it and saw the words “Human Blood” on the box, the Milwaukee-Wisconsin Journal Sentinel reported. He put the box in his truck and flagged own a police officer.

The box belonged to the Red Cross. A volunteer who was transporting six boxes likely left one on a car and it ended up on the street, a lab technician told police.

The box was safely delivered to a Red Cross location.