The assassination attempt on former President Donald Trump, who is running for reelection, is fueling a range of false claims and conspiracy theories as authorities seek information about the 20-year-old shooter's background and motive, how he obtained the AR-style rifle he fired at Trump and security at the venue that failed to stop the shooting.

Here's a look at the facts.

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Online posts falsely claim sharpshooter was told not to fire on suspect in Trump shooting

CLAIM: A law enforcement sniper assigned to Trump's rally Saturday in Butler, Pennsylvania, says the head of the Secret Service ordered him not to shoot the suspect accused of attempting to assassinate Trump.

THE FACTS: No such order was made. Snipers killed the suspected shooter moments after he opened fire on the former president, bloodying Trump's ear, killing one rally attendee and injuring two. The Secret Service and the Butler Police Department say they have no agents, officers or employees with the name of the person claiming to be the sharpshooter.

Following Saturday's attempt on Trump's life, a poster on the online message board 4chan wrote that they were a sniper assigned to the rally, and that they can be seen in a photo of two law enforcement officers on the roof at the rally.

"My name is Jonathan Willis," the poster wrote. "I came here to inform the public that I had the assassin in my sights for at least 3 minutes, but the head of the secret service refused to give the order to take out the perp. 100% the top brass prevented me from killing the assassin before he took the shots at president Trump," the post claimed.

But there is no agent or officer by the name of Jonathan Willis working for the Secret Service or the Butler police, and no internet records of such an officer could be located.

A spokesman for the Secret Service said snipers are trained and instructed to act whenever they see a threat, and do not await instructions before taking a shot to neutralize a suspect. He said he couldn't discuss the specifics of agency communication or the details of the ongoing investigation, but said the post was false.

Witnesses at the rally alerted law enforcement to the suspect, identified as Thomas Matthew Crooks, after they saw him perched atop a nearby roof. A local law enforcement officer climbed to the roof and found Crooks, who pointed the rifle at the officer. The officer retreated down the ladder, and the gunman quickly fired toward Trump, the officials said. That's when U.S. Secret Service gunmen shot him, officials have said.

Crooks, a nursing-home employee from suburban Pittsburgh, fired multiple shots at Trump with an AR-style rifle. A spectator was killed and two others were critically injured.

Authorities said the shooting was an attempted assassination, but haven't yet determined what motivated Crooks to try to kill Trump, the AP has reported.

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Posts misrepresent photo to claim Trump was shot in the chest and saved by a bulletproof vest

CLAIM: A photo shows a bullet hole in Trump's suit jacket, proving that he was shot in the chest during the attempted assassination.

THE FACTS: The photo actually shows a fold in the suit jacket of a Secret Service agent protecting Trump. Another Associated Press image taken moments before clearly shows there is no hole in Trump's jacket. What appears to be a hole can be seen diminishing as the agent moves in video of the shooting's aftermath.

Social media users are sharing the photo from the assassination attempt to claim that the former president was shot in the chest. Some posts suggest he survived because he was wearing a bulletproof vest.

In the image, what seems to be a small hole appears inches below Trump's right underarm. Many posts use a zoomed-in version of the photo that has a circle around the supposed hole to emphasize the hard-to-notice detail.

"#Trump was also shot in the chest," reads one X post. "The bulletproof vest saved him #We support Trump.

Another X post similarly reads, "It appears that Trump was shot in the chest, as the bullet seem to have pierced his suit; he was wearing a bulletproof vest."

But the apparent hole is actually a fold in the sleeve of the Secret Service agent's jacket, not the aftermath of a bullet.

The photo taken by an AP photographer shows the agent bending over as she protects Trump, her jacket appearing slightly darker than the former president's. The fold can be seen by following the edge of the agent's jacket from her neck to just below her left shoulder.

Moreover, another AP image taken moments before the one with the supposed hole clearly shows the right side of Trump's jacket as he raises his fist. No hole can be seen in the jacket.

Trump wrote on his social media platform that he was "shot with a bullet that pierced the upper part of my right ear." Photos and video from the rally show blood on his right ear and on the right side of his face.

The Secret Service declined to comment on details of the shooting, including where the bullets hit, and did not respond to a follow-up inquiry about whether Trump was wearing a bulletproof vest. Trump's campaign did not respond to a request for comment.

___ Photo edited to make it appear Secret Service agents were smiling after attempt on Trump's life

CLAIM: A photo from the attempted assassination of Trump shows Secret Service agents smiling as they surround him after the shooting.

THE FACTS: The photo was edited to make it appear the agents were smiling. In the original, taken by an Associated Press photographer, the same agents can be seen with neutral expressions.

After the shooting, social media users shared the altered image, with some suggesting it was evidence that the assassination attempt had been staged.

The photo shows Trump with blood on his face and ear, pumping his fist in front of an American flag while Secret Service agents surround him. Three agents whose faces are visible seem to be grinning as they protect the former president.

"Why are all 3 Secret Service agents smiling, at least that is how it appears to me," reads one post on X. "Do to the seriousness of the situation, I would think their expressions would be grim + determined. Now, if it was a staged event, these expressions would make more sense."

But the agents were not smiling at that moment. The photo was edited to make it appear otherwise.

The original image shows the same three agents with neutral expressions. One man is positioned behind Trump, a second man stands by his left shoulder and a woman is bent over on his right side, beneath his raised arm.

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Find AP Fact Checks here: https://apnews.com/APFactCheck.