The ministry's head of antiquities' department, Zahi Hawas, said an Egyptian team assisted by three foreign experts performed 1700 X-rays on the mummy in the past two months and found no evidence the young King Tut was killed.
An earlier theory said Tut was killed after a hole was found in his skull, but the latest tests ruled out that hypothesis, Hawas said.
"The team found no traces of a possible blow on the back of the head of the Pharaoh," he said.
He said Tutankhamen died in 1355 BC at the age of 19, apparently from natural causes.
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