GLEN ROSE, Texas: A former Navy special operations team member who wrote a best-selling book about his experiences as a sniper was fatally shot along with another man Saturday on a Texas gun range, local media reported.

Ex-Navy SEAL and "American Sniper" author Chris Kyle, 38, and a second man were found dead at Rough Creek Lodge's shooting range in Glen Rose, Erath County Sheriff Tommy Bryant said, according to the Fort Worth Star-Telegram and Stephenville Empire-Tribune newspapers.

Witnesses told sheriff's investigators that a gunman opened fire on the men around 3:30 p.m. Saturday, then fled in a pickup truck belonging to one of the victims, according to the Star-Telegram. The newspapers said a 25-year-old man was later taken into custody in Lancaster, southeast of Dallas, and that charges were expected.

Glen Rose is about 80 miles (128 kilometers) southwest of Dallas.

Kyle wrote the best-selling book, "American Sniper: The Autobiography of the Most Lethal Sniper in U.S. Military History," detailing his 150-plus kills of insurgents from 1999 to 2009.

Bryant did not immediately return phone calls to The Associated Press seeking comment late Saturday and early Sunday. Investigators did not immediately release the name of the second victim.

Kyle was sued by former Minnesota Gov. and ex-professional wrestler Jesse Ventura over a portion of the book that claims Kyle punched Ventura in a 2006 bar fight over unpatriotic remarks. Ventura says the punch never happened and that the claim by Kyle defamed him.

Kyle had asked that Ventura's claims of invasion of privacy and "unjust enrichment" be dismissed, saying there was no legal basis for them. But a federal judge said the lawsuit should proceed. Both sides were told to be ready for trial by Aug. 1.