How the deadly shooting at Donald Trump's Pennsylvania campaign ...

Chaotic scenes erupted on Saturday evening US time as former US president Donald Trump was injured by reported gunfire at a campaign rally in Pennsylvania. 

Here is a breakdown of what happened at the rally in Butler, PA. 

Trump was in the city of Butler in Pennsylvania, 590 kilometres west of New York City and 53km from the city of Pittsburgh. 

The former president began speaking to a large crowd gathered shortly after 5pm Eastern Time in Butler, Pennsylvania.(AP: Evan Vucci)

He was attending an afternoon rally as part of his campaign ahead of the November 5 presidential election, and was scheduled to speak at 5pm Eastern Time (7am AEST).

He has not yet announced his running mate for vice-president, and was expected to make that call this week. 

Video of the incident shows Trump, wearing his signature red MAGA hat, speaking onstage to a large crowd of Republican supporters.

Mid-sentence, the former president stops speaking as a popping sound rings out and he grabs his right ear. 

Donald Trump grabbed his ear on stage before ducking to the ground after shots were heard.

Supporters gathered behind him start to scream and duck for cover as more popping noises are heard. 

Trump looks around him and then ducks behind the lectern as Secret Service agents can be heard shouting: "Get down, get down, get down."

Secret Service agents rushed the stage to cover the former president after he was grazed on the ear by a bullet.(AP: Evan Vucci)

The agents form a pile on top of Trump as more shots are heard and the crowd descends into screams.

It appears there is just a two-second gap from the first popping sound to the third. 

Donald Trump sheltered behind a lectern onstage in Butler, Pennsylvania, as blood ran down his face.(Getty: Anna Moneymaker)

A fourth round of popping sounds rings out as more Secret Service agents run onstage and form a huddle before three heavily armed soldiers with assault rifles join them as they prepare to move Trump away. 

We can hear someone shouting: "Hawkeye's here."  

Hawkeye is a special counter-assault team that's part of the Secret Service, which guards all former and current US presidents and their families. 

Secret Service agents surrounded the former president in a protective huddle after he was injured.(Reuters: Brendan McDermid)

Once the Hawkeye agent is in position, the agents around Trump allow him to stand up from where he has been crouching behind the lectern. He asks them to "let me get my shoes".

The former president has a bloodied ear and cheek as he's lifted up by the circle of Secret Service agents.

Trump asked the agents to wait before escorting him offstage, saying"let me get my shoes".(Reuters: Brendan McDermid)

The crowd starts to cheer and clap as Trump stands, evidently relieved he appears not to be seriously injured. 

The former president looks shaken, but as they are escorting him off stage he asks them to "wait" and puts a defiant first in the air to further screams and cheers from the people in the stands around him. 

Donald Trump raises a fist after shots were fired at a rally, grazing his ear. July 14 2024.(AP: Gene J. Puskar)

They erupt in a chant of "USA" as he's moved offstage in a huddle by his security detail, shaking his fist repeatedly. 

The agents bundle him towards a waiting black SUV parked to the side of the stage as people continue to cheer and scream. 

Trump raises his fist again before he was whisked away with his team in the car. 

Trump's campaign team put out a statement shortly after the incident saying that the former president was "fine" and that he was being given medical attention at a local facility. 

"President Trump thanks law enforcement and first responders for their quick action during this heinous act," spokesperson Steven Cheung said.

Trump posted on social media several hours after the incident that "much bleeding" took place after hearing the sound of shots.

"I was shot with a bullet that pierced the upper part of my right ear," he wrote. 

A group of Secret Service agents bundled Trump into a car to take him to a local medical facility.(AP: Evan Vucci)

The Secret Service confirmed in a statement that the shooter and a rally attendee were dead, and two more people were critically injured. 

The rally location has been declared an active crime scene after police evacuated people from the site.

President Joe Biden said "there is no place in America for this kind of violence" in a press conference shortly after the incident. 

Authorities have said two people are dead, including the shooter, and two are critically injured.(Reuters: Brendan McDermid)