The man accused of shooting to death two men at a gun range at Rough Creek Lodge Saturday afternoon is behind bars at Erath County Jail.

Eddie Ray Routh, 25, of Lancaster is being held on a $3 million bond. He has been charged with two counts of murder and one count of capital murder in the shooting death of Chris Kyle, 38, and Chad Littlefield, according to Captain Jason Upshaw with Erath County Sheriff's Office.

Kyle is a former Tarleton State University student who wrote the best-selling book, "American Sniper."

The victims' bodies were discovered at a gun range about 3:30 p.m. Saturday by an employee of Rough Creek. The three men had apparently gone to the gun range to practice together when Routh turned the gun on the victims.

Upshaw would not comment on a motive, but a press release is scheduled for 2 p.m. at the Sheriff's Office.

Routh fled the scene in Kyle's truck and was taken into custody by police shortly before 9 p.m. Saturday night near his home in Lancaster.

Routh is reportedly an Iraqi war veteran who might have been struggling with Post Traumatic Stress Disorder.

Kyle founded FITCO Cares Foundation, an organization that helps veterans with PTSD.

Kyle was a former Navy SEAL who served four tours of duty in Iraq, where he was given the nickname "The Devil of Ramadi" by insurgents.

In 2008, he made his longest successful shot after he spotted an insurgent with a rocket launcher near a U.S. Army convoy at a range of 2,100 yards (1.2 miles).