Ken Bone, who shot to fame as an undecided voter at a 2016 presidential election debate, says his son was suspended from school over a photo at a gun range.

Bone's son was suspended on Thursday, days after his father posted the photo of him firing an assault rifle.

The Belleville, Illinois, native first posted the photo of his son on Twitter earlier this week.

Bone rose to fame as an undecided voter when he asked a question during a 2016 presidential election debate

Red sweater guy claims his son was suspended from school penidng a police investigation over the Twitter post pictured above

Bone was responding to a tweet by Marjory Stoneman Douglas student and gun rights activist Kyle Kashuv.

Kashuv had also posted a photo of himself at a gun range on Monday, and claimed he was 'wrongfully questioned' by police after his classmates reported him for shooting an AR-15 on camera.

On Tuesday Bone weighed in, sharing the picture and writing: 'Here's a pic of my son learning to shoot safely under my supervision. Maybe those security guys want to talk to him.'

Bone was responding to a tweet by Marjory Stoneman Douglas student and gun rights activist Kyle Kashuv, who claims he was questioned by police over a similar photo

Two days later, Bone posted the picture again, writing: 'Remember this photo from a few days ago? Well, a school administrator saw it and now my son is suspended from school pending a police investigation.'

The viral star also said his son didn't find out he was suspended until he received a call from the principal after school.

'Thing is, it wasn't his Twitter. It was mine,' Bone said on Twitter.

'He does not even have a Twitter account.'

Bone's claims caused a stir on Twitter, with some arguing he was probably not telling the whole story, and others expressing disbelief over the alleged school suspension.

The NRA's controversial spokeswoman Dana Loesch quoted Bone's tweet and said: 'Seriously?'