Republican Presidential candidate Donald Trump survived an assassination attempt as he addressed his supporters during a rally in Pennsylvania on Saturday.

The former president, his ear covered in blood, was quickly pulled away by Secret Service agents and his campaign said he was "fine."

The attack, by a shooter who law enforcement officials say was then killed by the Secret Service, was the first attempt to assassinate a president or presidential candidate since Ronald Reagan was shot in 1981. It comes amid a deeply polarized political atmosphere, just four months from the presidential elections and days before Trump is to be officially named the Republican nominee at his party’s convention.

A local prosecutor said the suspected gunman and at least one attendee are dead.

"President Trump thanks law enforcement and first responders for their quick action during this heinous act," spokesman Steven Cheung said in a statement. "He is fine and is being checked out at a local medical facility. More details will follow."

The Secret Service said in a statement that "the former President is safe." Trump’s eldest son, Donald Trump Jr., said after 8 p.m. that he spoke to his father on the phone and that "he is in great spirits."

"There's no place in America for this type of violence," President Joe Biden, who is running against Trump as the presumptive Democratic nominee, said in remarks. "It’s sick. It’s sick."

Two officials spoke to The Associated Press on the condition of anonymity to discuss the ongoing investigation. They said the shooter was not an attendee at the rally and was killed by U.S. Secret Service agents.

The officials said the shooter was engaged by members of the U.S. Secret Service counterassault team and killed. The heavily armed tactical team travels everywhere with the president and major party nominees and is meant to confront any active threats while other agents focus on safeguarding and evacuating the person at the center of protection.

It’s still not clear yet whether Trump was struck by gunfire or was injured as he was pulled to the ground by agents.

Butler County district attorney Richard Goldinger said in a phone interview that the suspected gunman was dead and at least one rally attendee was killed.

Trump, the presumptive Republican nominee, was showing off a chart of border crossing numbers during his last rally before the Republican National Convention opens Monday when the apparent shots began.

It took two minutes from the moment of the first shot for Trump to be placed in a waiting SUV.

As Trump was talking, a popping sound was heard, and the former president put his right hand up to his right ear, as people in the stands behind him appeared to be shocked.

As the first pop rang out, Trump said, "Oh," and grabbed his ear as two more pops could be heard and he crouched down. More shots are heard then.

Someone could be heard saying near the microphone at Trump’s lectern, "Get down, get down, get down, get down!" as agents tackled the former president. They piled atop him to shield him with their bodies, as is their training protocol, as other agents took up positions on stage to search for the threat.

Screams were heard in the crowd of several thousand people. A woman is heard screaming louder than the rest. Afterward, voices were heard saying "shooter’s down" several times, before someone asks "are we good to move?" and "are we clear?" Then, someone ordered, "Let’s move."

Trump could be heard on the video saying at least twice, "Let me get my shoes, let me get my shoes," with another voice heard saying, "I’ve got you sir."

Trump got to his feet moments later and could be seen reaching with his right hand toward his face. There appeared to be blood on his face. He then pumped his fist in the air and appeared to mouth the word "Fight" twice his crowd of supporters, prompting loud cheers and then chants of "USA. USA. USA."

The crowd cheered as he got back up and pumped his fist.

His motorcade left the venue moments later. Video showed Trump turning back to the crowd and raising a fist right before he is put into a vehicle.

Police began vacating the fairgrounds shortly after Trump left the stage in what local officers described as a crime scene.

The perils of campaigning took on a new urgency after the assassination of Robert F. Kennedy in California in 1968, and again in 1972 when Arthur Bremer shot and seriously hurt George Wallace, who was running as an independent on a campaign platform that has sometimes been compared to Trump’s. That led to increased protection of candidates, even as the threats persisted, notably against Jesse Jackson in 1988 and Barack Obama in 2008.

Presidents, particularly after the assassination of John F. Kennedy in 1963, have even greater layers of security. Trump is a rarity as both a former president and a current candidate.

Biden was briefed on the incident, the White House said. He received an updated briefing from Kimberly Cheatle, the director of the United States Secretary Service, Homeland Security Secretary Alejandro Mayorkas, and White House homeland security adviser Liz Sherwood-Randall.

He told reporters after 8 p.m. that he hadn't been able to reach Trump yet but was briefed that the former president was "doing well."

"I hope I get to speak to him tonight," he said.

After the shooting at Trump’s rally the Biden campaign was pausing all messaging to supporters and is working to pull down all of its television ads as quickly as possible, the campaign said.

Trump’s eldest son, Donald Trump Jr., posted a photo on X of Trump, his fist raised and his face bloody in front of an American flag, with the words: "He’ll never stop fighting to Save America."

North Dakota Gov. Doug Burgum, Florida Sen. Marco Rubio and Ohio Sen. JD Vance, the three men on Trump's shortlist for vice president, all quickly sent out statements expressing concern for the former president, with Rubio sharing an image taken as Trump was escorted off stage with his fist in the air and a streak of blood on his face along with the words "God protected President Trump."

Pennsylvania Gov. Josh Shapiro, a Democrat, said in a statement on X that he had been briefed on the situation and Pennsylvania state police were on hand at the rally site.

"Violence targeted at any political party or political leader is absolutely unacceptable. It has no place in Pennsylvania or the United States," he said.