One spectator was killed and two were critically hurt in Saturday's shooting.
Federal authorities are investigating after former President Donald Trump was shot in the ear in an assassination attempt at an election rally in Butler, Pennsylvania, on Saturday.
Blood splattered on Trump's face as Secret Service agents surrounded him and led him off the stage to a waiting vehicle to whisk him away. Trump is "fine," a spokesperson said.
The alleged shooter was killed by snipers. Corey Comperatore, a firefighter and a father of two daughters, died in the shooting Pennsylvania Gov. Josh Shapiro said. Two other people who attended the rally were also injured.
The suspected shooter was a man and was killed by a Secret Service counter-sniper, according to a source familiar with the investigation.
His identity hasn't been immediately confirmed.
FBI Director Christopher Wray briefed Biden and the national security adviser Jake Sullivan, according to the source.
The president will be departing from his home in Delaware and return back to the White House tonight, officials announced.
Biden is expected to arrive at 12:30 a.m., the White House said.
Donald Trump was only minutes into his rally speech in Butler, Pennsylvania, on Saturday evening when gunshots rang out, he dropped behind the lectern and he was swarmed by Secret Service agents.
READ MORE | How the possible assassination attempt on Donald Trump unfolded
The shooting at the Trump rally is officially being investigated as an assassination plot on Trump, a senior defense official told ABC News.
Early evidence indicates that there was only one shooter, according to the source.
Attorney General Merrick Garland said in a statement that the FBI; Bureau of Alcohol, Tobacco, Firearms and Explosives; U.S. Attorney's Office for the Western District of Pennsylvania; and the Department's National Security Division will be involved in the investigation.
"My heart is with the former President, those injured, and the family of the spectator killed in this horrific attack," he said in a statement. "We will not tolerate violence of any kind, and violence like this is an attack on our democracy. The Justice Department will bring every available resource to bear to this investigation."
