Darsh Patel is confirmed as the first person in New Jersey's history to be killed by a bear, officials said.
Patel was killed by the 300-pound bear's claws and teeth on September 22, Chief Timothy Storbeck of the West Milford police said.
Patel's cause of death is listed as "mauling" - and the cause of the fatal injury is "mauled by bear," authorities were quoted as saying by the nj.Com website.
Patel sustained numerous bites and claw marks, the report said.
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However, the full autopsy results, which include toxicology tests, are likely to take several months, they added.
Neither of the hiking groups in the woods that evening intimidated or provoked the bear, according to the investigation.
Patel was part of a group of five friends from Edison who were hiking through the Apshawa Preserve, a wooded area of West Milford.
They ran in different directions when a black bear began to follow them. The group noticed Patel was missing once they got to safety and immediately called police.
Evidence at the scene indicated that the victim had been attacked by a bear.