Donald Trump said people must remain “defiant in the face of wickedness” after he survived an assassination attempt during a campaign rally.

Prime Minister Sir Keir Starmer has said he was “appalled” by the attack on the former US president and spoke to him on Sunday afternoon, while Reform UK leader Nigel Farage said he was “very upset” but “not shocked”.

The PA news agency understands Sir Keir condemned the violence, expressed his condolences for the victims and their families, and wished Mr Trump and those injured a quick recovery.

Writing on his Truth Social platform on Sunday, Mr Trump thanked well-wishers and said “it was God alone who prevented the unthinkable from happening”.

“We will fear not, but instead remain resilient in our faith and defiant in the face of wickedness.”

He added: “Our love goes out to the other victims and their families.

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Donald Trump is helped off the stage by US Secret Service agents (Gene J. Puskar/AP)

“We pray for the recovery of those who were wounded, and hold in our hearts the memory of the citizen who was so horribly killed.

“In this moment, it is more important than ever that we stand united, and show our true character as Americans, remaining strong and determined, and not allowing evil to win.

“I truly love our country, and love you all, and look forward to speaking to our great nation this week from Wisconsin. DJT”

His wife, former US first lady Melania Trump, said:”When I watched that violent bullet strike my husband, Donald, I realised my life, and Barron’s (the couple’s son) life, were on the brink of devastating change.”

Mrs Trump said she was “grateful to the brave secret service agents and law enforcement officials who risked their own lives”.

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(PA Graphics)

She added: “A monster who recognised my husband as an inhuman political machine attempted to ring out Donald’s passion – his laughter, ingenuity, love of music, and inspiration.

“The core facets of my husband’s life – his human side – were buried below the political machine.”

Mr Farage said he would “almost certainly would have been” at Saturday’s rally in Pennsylvania if he had not won his Clacton seat at the General Election and now planned to travel to the US for the 2024 Republican National Convention as a “show of friendly solidarity” with Mr Trump, who he considers a friend.

US president Joe Biden, addressing his country on Sunday evening, said he has directed the head of the Secret Service to review all security measures for the Republican National Convention, scheduled to begin on Monday.

Photographs have shown the bloodied former US president defiantly pumping his fist in the air after shots were fired at a campaign rally in Butler.

Mr Trump, who was “safe” according to a spokesman, said on his Truth Social media platform that a bullet had “pierced” his ear before he was dragged to the ground by Secret Service agents.

One person at the rally was killed and two other spectators were critically injured, authorities said.

All were identified as men.

The dead man was later named as Corey Comperatore, a former fire chief.

Pennsylvania governor Josh Shapiro said: “Corey died a hero. Corey dove on his family to protect them last night.”

The suspected gunman, who attacked from an “elevated position” outside the rally venue, was fatally shot.

Asked how he felt after the shooting, Reform UK leader Mr Farage told the BBC’s Sunday With Laura Kuenssberg: “I was very upset and I’m still upset.

“I’m obviously pleased that my friend Donald has got away with it, only just, but he’s got away with it.

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Nigel Farage said he was ‘very upset’ (Tejas Sandhu/PA)

“But one person is dead.

“Two more are fighting for their lives in hospital so it’s an absolutely horrendous incident and yet somehow I’m not shocked by it.

“The narrative that is put out there about Trump by the liberals that oppose him is so nasty, so unpleased, that I think it almost encourages this type of behaviour.”

Mr Farage told Sky News’ Sunday Morning With Trevor Phillips that he had sent a text message to the former president.

The Prime Minister said: “I am appalled by the shocking scenes at President Trump’s rally and we send him and his family our best wishes.

“Political violence in any form has no place in our societies and my thoughts are with all the victims of this attack.”

Conservative leader Rishi Sunak said: “Horrified by the attack in Pennsylvania.

“In a democracy, you must be able to speak freely and stand for what you believe in.

“Violence and intimidation must never be allowed to prevail.

“My thoughts and prayers are with President Trump and the victims of this appalling attack.”

Foreign Secretary David Lammy said the Government “condemns all forms of political violence in the strongest terms”.

Posting on X, formerly known as Twitter, he said: “As we monitor the shocking developments in Pennsylvania, our thoughts and best wishes are with President Trump – along with every victim and their families.”

Former Conservative prime minister Boris Johnson said it was “a miracle that Donald Trump escaped an attempted assassination”.

Writing on social media, he added: “As we give thanks for his safety we are reminded once again of the tragic fragility of democracy in the face of violence and unreason.

“Our thoughts are with the president and the Trump family.”

Liberal Democrat leader Sir Ed Davey tweeted: “Political violence is wrong.

“I am shocked to wake up to these awful scenes from Pennsylvania and my thoughts are with the victims and their families.

“We must all condemn this appalling attempt on Donald Trump’s life.”

Mr Trump was showing a chart of border crossing numbers when bangs started ringing out after 6.10pm local time.

The ex-president could be seen grimacing and reaching with his right hand towards the side of head, before blood appeared on his face.

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Donald Trump was left bloodied after the shooting (Gene J Puskar/AP)

He ducked and was surrounded by Secret Service agents, before rising to his feet and pumping his fist in the air, to cheers from the crowd.

The FBI named 20-year-old Thomas Matthew Crooks, of Bethel Park, Pennsylvania, as the gunman.

A motive has not yet been identified, but authorities are treating the shooting as an assassination attempt.

President Joe Biden was briefed on the incident and spoke to Mr Trump several hours after the shooting, the White House confirmed.

He called the shooting “sick”, adding: “There’s no place in America for this type of violence.”

It was the most serious attempt to assassinate a US president or presidential candidate since Ronald Reagan was shot in 1981.