Down a winding road just off Highway 26 near Warm Springs, dozens of cars slowly creep down a gravel road.

The cars are filled with fishermen all headed to Mecca Flat Recreation Area hoping to land the big catch in the Deschutes River.

But it's what one of them found on land Wednesday morning that has many talking.

"When I came in, there were three sheriff's cars and crime scene tape and a lot more activity than normal," Randy Carrier, a passing fisherman, said Thursday evening.

Around 9 a.m. Wednesday, a body was found in a century-old abandoned tunnel off Mecca Road, near the Rainbow Market.

Investigators say an out-of-town fisherman had decided to explore the area and came across what quickly became the scene of a homicide investigation.

Jefferson County sheriff's deputies say they believe the man is in his mid to late 40's, and not from the area.

One man passing by the tunnel, headed for Mecca Flat Thursday, said the tunnel is frequented by a group known locally as the Road Warriors.

He said they use the area for shelter and oftentimes drink alcohol.

It's not known if anyone from that group is a suspect in the case.

Sheriff Jim Adkins told NewsChannel 21 they are working a lead which they can not disclose just yet.

The body was taken to the state Medical Examiner's Office near Portland Thursday for an autopsy.

Deputies say it appears the body had not been in the tunnel for very long.

The taped-off crime scene is near a road on a hill behind the Rainbow Market, about a half-mile from Highway 26, Adkins said.

The remains were found in Jefferson County, just south of the Warm Springs Indian Reservation boundary.

Anyone with information that could assist investigators was asked to contact the sheriff's office at (541) 475-2201. You could also contact the Crime Stoppers Tip Line at 1-877-876 TIPS, or use the form on KTVZ.COM's Crime Stoppers page. You can remain anonymous, and you could be eligible for a cash reward.