Authorities said the body of a man was found along a trail near the Windy Run Park area in Arlington.
No identity was released and few details were immediately available. Arlington County police said the cause of death was not clear.
The body was found by a hiker Tuesday morning off the Potomac Heritage Trail, which is near the George Washington Parkway between Spout Run Parkway and Chain Bridge, according to Sgt. Anna Rose, a spokeswoman with the U.S. Park Police.
The person who saw it called Arlington County police. The U.S. Park Police is the lead agency investigating.