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The body of an American scientist has been found inside a World War Two bunker on the Greek island of Crete.

Suzanne Eaton, who went missing more than a week ago after going on a run, died of suffocation, police confirmed to the ����ý.

They say they are investigating the case as a criminal act.

The 59-year-old molecular biologist from the world-renowned Max Planck Institute in Germany had been attending a conference on the island.

She was found on rough and rocky terrain inside the abandoned bunker about 10km (six miles) away from where she was last seen, according to police in the port city of Chania, where the conference was being held.

She was reported missing on 2 July and a large search effort was launched.

Six days later, her body was discovered by two locals exploring the bunker, which is a system of manmade caves used by the Nazis during the occupation of Crete in World War Two.

According to Cretalive news website, a forensic autopsy found she had been suffocated but there was no other indication of trauma.

Police are investigating whether Suzanne Eaton was killed inside the bunker or moved there after the event, it adds.

, a rough cloth, leading Greek authorities to conclude she had been killed.

According to a local official speaking to ABC News, the area around the bunker, which lies to the north-west of the island, is a popular tourist spot.

The scientist's family, friends and colleagues had launched a Facebook page co-ordinating search efforts and offering a €50,000 ($56,000; £45,000) reward for information on her whereabouts.

: "It is with enormous sadness and regret that we announce the tragic demise of our dearest friend and colleague, Suzanne Eaton... We are deeply shocked and disturbed by this tragic event."

Suzanne Eaton was married with two sons.