Chris Kyle, a former Navy SEAL and author of "American Sniper," was murdered Saturday afternoon at a gun range 53 miles outside Fort Worth, Tex. While many in the country mourned his loss, Twitchy reported Sunday that a number of anti-gun liberals on Twitter mocked and celebrated his murder.

"I am absolutely against guns being used for any reason, but in the matter of Chris Kyle, I'd have to say it was poetic justice," one personwrote.

"All u hypocrites can miss me with the Chris Kyle American Sniper sympathy bulls**t, I call his death karma. Feel for his family not him,"said another user on Twitter.

"Chris Kyle was killed at a gun how ironic lol live by the gun die by the gun now I really believe he had it coming to him," said"Patricia."

"[O]h the irony! lol," added "GrantT."

A number of Twitter users called his murder "karma," while many, like "GrantT," apparently thought Kyle's murder was something to laugh about.

"LOL to the kid who compared Chris Kyle's death to the movie Shootout," said "Sean Flynn."

Kyle, who leaves behind a wife and two children, served four tours of duty in Iraq, was wounded twice and has 160 confirmed kills, WFAA reported.

He was discharged from the Navy in 2009 and became the president of Craft International, a company that trains military and law enforcement professionals.

WFAA said that multiple agencies, including the Texas Rangers, are involved in the investigation and one suspect, 25-year-old Eddie Routh, a Marine veteran reportedly suffering from post-traumatic stress disorder, was arrested after a short pursuit.

Kyle, WFAA added, was active in helping veterans who suffer from PTSD.

"Our foundation, FITCO Cares, this country and most importantly, his wife Taya and their children, lost a dedicated father and husband, a lifelong patriot and an American hero," said Travis Cox, director of FITCO Cares Foundation, an organization dedicated to helping veterans with PTSD.

"Chris was a wonderful man, a good friend, and a true American hero who loved our country and served honorably. He was loved and admired by so many, and he will never be forgotten," Sarah Palin wrote on Facebook Saturday.