A hiker from New Jersey found dead Monday after disappearing for more than two weeks in upstate New York reportedly died from pneumonia caused by exposure.

Alex Stevens, 28, of Hopewell, may have survived until three days before he was found, the local coroner and medical examiner told the Adirondack Daily Enterprise.

Alex Stevens

Stevens was last seen was by hikers Sept. 2 at the base of Wallface Mountain in the Newcomb area, according to New York State Police. He had planned only a three-day hike.

He was reported missing by friends Sept. 9 after he failed to show up in New York City.

Officials told the newspaper that a lack of food, the constant wet environment and the cold led to pneumonia.

New York State Police and several local agencies searched for Stevens, whose body was found around 11 a.m. Monday.

Rob Jennings may be reached at rjennings@njadvancemedia.com. Follow him on Twitter @RobJenningsNJ. Find NJ.com on Facebook