STEPHENVILLE, Texas – A 25-year-old Iraq war veteran charged with murdering former Navy SEAL and “American Sniper” author Chris Kyle and his friend turned a gun onto the pair while they were at a Texas shooting range, authorities said Sunday.

Eddie Ray Routh of Lancaster was arraigned early Sunday in the deaths of Kyle, 38, and Chad Littlefield, 35, at a shooting range at Rough Creek Lodge, about 50 miles southwest of Fort Worth. He was being held on one charge of capital murder and two charges of murder.

Capt. Jason Upshaw with the Erath County Sheriff’s Office said Routh used a semiautomatic handgun, which authorities later found at his home. Upshaw said ballistics tests weren’t complete Sunday, but authorities believe it was the gun used in the shootings. Upshaw declined to give any more details about the gun.