A farmer in Oregon was reportedly eaten by his hogs and the authorities are investigating the incident.

The authorities were unable to give any other explanation for the death of 69-year-old Terry Vance Garner except that he had been possibly killed and devoured by his hungry pigs.

Vance went to feed his hogs, weighing 700 pounds, in his farm in rural Riverton last Wednesday and never came back. One of his relatives looking for him found his dentures and other body parts scattered across the hog’s enclosure, but most of his body parts were consumed, the Associated Press reported.

Coos County district attorney Paul Frasier said that they were investigating the various possibilities, including the involvement of other humans in the crime.    

Frasier said there was a possibility that Vance had a medical emergency such as heart attack or was knocked unconscious by the hefty animals, then killed and eaten, The Registry Guard reported.

 "For all we know, it was a horrific accident, but it's so doggone weird that we have to look at all possibilities," Frasier told The Register-Guard.

According to The World report, a forensic pathologist examined Vance’s body parts Saturday but was unable to identify the cause of the death. Further examinations of the remains would be conducted by a forensic anthropologist from the University of Oregon.

Vance’ brother Michael Garner told the AP that one of the pigs had a history of violence.  A pig bit Vance last year when he accidently stamped on one of the piglets, Garner said.

"He said he was going to kill it, but when I asked him about it later, he said he had changed his mind," he told the AP.

Pigs are omnivorous and past incidents of pigs eating humans are rare.

A three-year-old boy named Ajay was eaten alive by a herd of domestic pigs in Delhi, India, in 2006, according to local media reports.