Controversial radio host Alex Jones has been sued by the parents of several Sandy Hook shooting victims over his claims that the 2012 massacre was staged.

Three parents who lost children in the mass shooting sued the InfoWars host for defamation, claiming his comments on the incident caused them mental stress and anguish, as well as damage to their reputations.

“Our clients have been tormented for five years by Mr Jones’ ghoulish accusations that they are actors who faked their children’s deaths as part of a fraud on the American people,” said attorney Mr Bankston, who has also sued Mr Jones for falsely identifying the gunman in a school shooting in Parkland, Florida.

He added: “Enough is enough.”

Mr Jones – a celebrity in far-right media circles for his bombastic, often unverified reporting – has suggested since 2013 that the shooting at Sandy Hook Elementary may have been faked by the government and covered up with the help of the victims’ families.

He responded to the suits with a video statement on Tuesday night, in which he claimed he was merely playing devil's advocate when he called the shooting "a hoax" and "completely fake". He said he did believe that children had died at Sandy Hook, but that it was the result of police standing down. The victims' parents, he added, were being "used" by the media.

"They’re being manipulated by the Democratic party, by the big media, to be part of the news cycle, to say, 'Alex Jones is fake news' […] to set the president, as they admit, to de-platform everybody and kill the First Amendment," he said.

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One of the plaintiffs in the lawsuit is Veronique De La Rosa, the mother of a Sandy Hook victim, who Mr Jones has long claimed was a participant in a staged interview with CNN’s Anderson Cooper. He said in 2014 that her interview was conducted in a studio, in front of a “blue screen,” and doctored to look as if it was shot on location.

The next year, he circulated a conspiracy theory about Ms De La Rosa's son, whose photo was seen at a vigil for victims of a school attack in Pakistan. The photo was part of a tribute to children lost in school attacks around the world, according to the lawsuit.

Mr Jones repeated his claims about Ms De La Rosa last year, in a broadcast titled “Sandy Hook Vampires Exposed.” He claimed her interview must have been staged because of a moment in which Mr Cooper’s nose seems to disappear. The moment is in fact the result of motion compensation video compression, and does not occur in high-quality videos of the interview.

Sandy Hook elementary school shooting 2012 Show all 5 1 /5 Sandy Hook elementary school shooting 2012 Sandy Hook elementary school shooting 2012 con0.ap.jpg Scenes of shock and devastation at the Sandy Hook Elementary School in Newtown, Connecticut AP Sandy Hook elementary school shooting 2012 v2Connecticut.jpg Picture from local newspaper the Newtown Bee shows Connecticut State Police lead children from the Sandy Hook Elementary School AP Sandy Hook elementary school shooting 2012 con1.reut.jpg The scene outside the primary school following the incident REUTERS Sandy Hook elementary school shooting 2012 con2.reut.jpg Concerned parents picking up their children following the shooting REUTERS Sandy Hook elementary school shooting 2012 obama.reut.jpg Obama wipes away a tear during the press conference REUTERS

That same year, Mr Jones spoke out about another of the plaintiffs, Neil Heslin, who lost his son in the shooting. Mr Heslin had told NBC’s Megyn Kelly about how he “held [his] son with a bullet hole through his head".

Mr Jones responded by airing a segment in which a reporter claimed that this was not possible, because coroners had said victims were originally identified by their photos, not their bodies.

“Will there be a clarification from Heslin or Megyn Kelly?” the reporter, Owen Shroyer, asked. “I wouldn’t hold your breath. So now they’re fuelling the conspiracy theory claims.”

News reports from the time show the victims’ bodies were ultimately released to funeral homes.

Mr Bankston filed the suits on behalf of Mr Heslin, Ms De La Rosa, and her ex-husband Leonard Pozner in Travis County District Court in Texas on Monday. He said the families had been deeply hurt by Mr Jones's comments, which he called "the most disgusting act of defamation in the history of American media".