The shooting, along the side of the highway in Upper Freehold, was reported about 3 p.m.
An unconfirmed report said the gunshot may have been self-inflicted.
EMS were reportedly taking the shooting victim to Capital Regional Medical Center in Trenton.
There were no immediate details from New Jersey State Police.
This is a developing news story.
CHECK BACK FOR UPDATES
Click here to follow Daily Voice Middletown and receive free news updates.