Researchers studying Oetzi, a 5,300-year-old body found frozen in the Italian Alps in 1991, have found red blood cells around his wounds.
Blood cells tend to degrade quickly, and earlier scans for blood within Oetzi's body turned up nothing.
Now a study in the Journal of the Royal Society Interface shows that Oetzi's remarkable preservation extends even to the blood he shed shortly before dying.
The find represents by far the oldest red blood cells ever observed.
It is just the latest chapter in what could be described as the world's oldest murder mystery.
Since Oetzi was first found by hikers with an arrow buried in his back, experts have determined that he died from his wounds and what his last meal was.
There has been extensive debate as to whether he fell where he died or was buried there by others.
In February, Albert Zink and colleagues at the Eurac Institute for Mummies and the Iceman in Bolzano, Italy published Oetzi's full genome.
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