Image source, Getty Images

Prime Minister Sir Keir Starmer was "appalled by the shocking scenes", external and sent Trump and his family "our best wishes". He spoke to Trump this afternoon.

It was a similar tone from the president of the European Commission who says she's "deeply shocked" by the shooting. Ursula von der Leyen paid respect to the family of the victim, adding "political violence has no place in a democracy".

German Chancellor Olaf Scholz described the incident as "despicable" saying "such acts of violence threaten democracy".

A spokesperson for the Chinese foreign ministry said the country is "concerned" about what happened and also expressed "condolences" to the former president.

Pakistani Prime Minister Shehbaz Sharif condemned "all violence in politics".

Indian prime minister Nahendra Modi wished the president a "speedy recovery" saying "violence has no place in politics and democracies".

Whilst Israel Prime Minister Benjamin Netanyahu says he's "shocked" by the incident.

You can listen to how events unfolded at the campaign rally on the latest episode of the Americast podcast on BBC Sounds.

Chris Mason
Political editor

The prime minister has spoken to Donald Trump this afternoon.

Sir Keir Starmer condemned the violence, sent his condolences to the victims and their families and wished Donald Trump and the other people who were injured a speedy recovery.

Bernd Debusmann Jr
Reporting from Bethel Park, Pennsylvania

There's still a heavy police presence near the Crooks' residence, where police are blocking roads and were the bomb squad reportedly arrived a short while ago.

I've just spoken to Jason Mackey, a 27-year-old local man who lives near the suspect's house and who worked at the same high school that he attended.

Mackey said that while he didn't know Crooks personally, he'd "like to think I saw his face in the hallways or a gym class."

Mackey said the community is still in a sense of disbelief.

"It's just shocking. You wouldn't think an event of this magnitude would come right out of your backyard," he said. "It's just a crazy situation."

Republican National Convention (RNC) officials have said they are working alongside Secret Service and dozens of law enforcement agencies to secure the event ahead of Donald Trump's appearance there this week.

In the last few hours, Donald Trump confirmed his plans to attend the convention in Milwaukee, where delegates are expected to vote him in as the party’s presidential nominee.

Speaking to Fox News, RNC chair Michael Whatley says his team feels "very comfortable" working with Secret Service and "40 different law enforcement agencies" on security.

He adds that he thinks it's going to be “tremendously important" for Trump to be in attendance, and for him to deliver a message of "unity" for America.

Image source, EPA-EFE/REX/Shutterstock

The last few hours have seen areas of the US waking up and further details of the shooting, the gunman and the response have emerged.

If you're just joining us now, here's a few developments you might have missed.

• We've had a response from Melania Trump who called the gunman a "monster" and acknowledged that both her life and that of her son Barron "were on the brink of devastating change"
• The latest on the two injured victims is that they remain in critical condition - their identities are still unknown.
• In addition to the shooter, one adult male died while standing in the audience. He has been identified as volunteer fire chief Corey Comperatore, 50.
• We're starting to learn more about the gunman, Thomas Crooks, himself. State voter records indicate he was a registered Republican. We now know that he did not have any military background. He was also a graduate of Bethel Park High School and you can see a school yearbook image of him here
• Our colleagues reporting from the area are telling us that police have closed off a wide vicinity around Crooks' home. One resident has said she has been evacuated from her home
• Reports are coming through that suspicious devices have been found in Crooks' car. The Associated Press and CNN are now also reporting explosive material has been uncovered at his home. This news line is still developing and we'll bring you more as we get it

We have further details about the shooter here, and pictures from last night's rally here. You can also listen to our Americast podcast of the attempted assassination here.

Finally, Shapiro takes one more question on Corey Comperatore.

He says Comperatore "died a hero".

"His wife shared with me he dove on his family to protect them," Shapiro says before walking off.

Governor Shapiro says he is not going to answer questions on the ongoing investigations.

He is asked about suspicious items found in the shooter's vehicle - Shapiro defers to his previous answer that law enforcement will be the ones to make updates on the investigation.

Shapiro says he has not spoken directly to Donald Trump - but says he has spoken with US President Joe Biden, who asked if the Pennsylvania governor had "all the resources they need".

He has directed flags be flown at half mast in memory of Corey Comperatore.

"Above all else we are Americans," Shapiro tells reporters.

Shapiro says he has been speaking to the families of the two people who were shot and are still being treated.

He then goes onto pay tribute to volunteer fire chief Corey Comperatore, 50, who he says was killed last night and "dived on his family" to protect them.

Shapiro says he is releasing the information after speaking to Comperatore's wife. He then turns to take questions - we'll have more updates soon.

Pennsylvania Governor Josh Shapiro has just begun addressing the media from Butler County.

We'll have lines from his update shortly - and you can watch live by pressing play at the top of the page.

A new law could give Donald Trump, Joe Biden and presidential candidate Robert Kennedy Jr enhanced Secret Service protection.

Congressmen Ritchie Torres (Democrat) and Mike Lawler (Republican) issued a statement saying: "Last night's attempted assassination of former President Trump was a dark moment in our nation's history.

"As reports continue to emerge, it's clear that more protection is needed for all major candidates for president.

"That's why we're planning on introducing bipartisan legislation providing President Joe Biden, former President Donald Trump, and presidential candidate Robert Kennedy Jr, with enhanced Secret Service protection.

"Anything less would be a disservice to our democracy."

Image source, EPA

Our US partners, CBS, have spoken to a law enforcement official who confirms "suspicious devices" were found in Thomas Crooks' vehicle.

Bomb technicians were called to the scene.

We'll have more details when we have them.

Bernd Debusmann Jr
Reporting from Bethel Park, Pennsylvania

I've just spoken to Lawrence Muir, a former Trump administration official, who grew up just a few miles from the home of the gunman, Thomas Crooks.

Muir - former general counsel and acting chief of staff to the White House Office of National Drug Control Policy - tells me it is an "extremely close-knit community".

"This is one of the nicest places you could ever grow up. It's a time warp of how America used to always be," he says. "It's a bubble."

The Bethel Park area, he says, was in his experience largely apolitical. He saw it as a place to escape the "stress of DC".

"I have a rough time making sense of it," he adds.

Image source, EPA

Here's a different angle of the attack at last night's rally in Butler, Pennsylvania. Video posted on social media shows a secret service sniper on a roof, as the first shots are heard.

Earlier, the Wall Street Journal reported that explosive devices were found inside Thomas Crooks' car at the rally, according to people briefed on the investigation.

The Associated Press and CNN now both report that explosive material was also uncovered at his home, with both outlets citing law enforcement officials.

Vice-President Kamala Harris has cancelled an appearance in Palm Beach, Florida, on Tuesday.

She was expected to moderate a conversation about abortion rights and Donald Trump's stance on the issue.

"In light of the horrific shooting in Pennsylvania, the Vice-President's planned campaign trip to Florida has been postponed," the campaign said in a statement.

Image source, EPA

The Pentagon has just confirmed the gunman, Thomas Crooks, did not have any military ties.

"We've confirmed with each of the military service branches that there is no military service affiliation for the suspect with that name or date of birth in any branch, active or reserve component in their respective databases," Pentagon spokesperson Maj Gen Patrick S Ryder says.

Joe Inwood
BBC News

Image source, DOUG MILLS/THE NEW YORK TIMES/REDUX/EYEVINE

The photo is extraordinary. Taken by a New York Times photographer, it shows what appears to be a bullet in mid-flight, passing right by the head of former President Donald Trump.

So, what do we know about the weapon used in the attack, the damage it can do, and just how close Donald Trump came to death?

The security services say an AR-15 was recovered from the scene. Sometimes called "America’s Rifle", it has been involved in numerous mass shootings.

It usually fires a 5.56mm round, the Nato standard, although can be converted to fire other calibres. The AR-15 would easily be able to kill at that range, as evidenced by the one death (at least) in the crowd.

According to Justin Crump of the security analysts Sibylline, for assault rifles to cause maximum damage "the energy in the round has to dissipate, which requires a hard stop".

It is the transference of energy, rather than just the physical displacement caused by the bullet, that makes assault rifles so devastating.

The fact the bullet grazed his ear meant that the devastating potential energy contained within the round did not transfer.

It will not have been without consequences, however, according to Crump. "The shockwave past the eardrum won’t have been fun and it could leave an interesting scar," he says.

Had the bullet been just an inch to the right, or the former president’s head at a slightly different angle, all that kinetic energy would have transferred itself to him, with devastating consequences.

In short, Trump was inches from death.

Tom Bateman
Reporting from Bethel Park, Pennsylvania

Image source, EPA-EFE/REX/Shutterstock

We arrived at Bethel Park, the area that was home to gunman Thomas Crooks, shortly after dawn.

Police have closed off a wide vicinity around Crooks’ home, with fire department vans lining a cordon and the FBI searching his home.

One neighbour tells me 20-year-old Crooks went to the same school as her son.

"He rode my son’s school bus," says Kelly Little, who has lived here for more than two decades. "He’s just a kid that lives on my street as far as I’m concerned."

This is a suburban, middle class, predominantly white neighbourhood in a suburb of Pittsburgh, Pennsylvania.

American flags fly on porches. One garden has Trump 2024 campaign posters in the garden.

Overall the suburbs here are a tight race between the two parties, although this county tends to lean Democrat as a whole.

The street to Crooks' home is blocked by a Pennsylvania State Police Trooper’s car as the FBI and other law enforcement search the premises.

Little tells me she was evacuated from her home close to the gunman's house.

"The state police came to the door and told us that we had to evacuate, that there was a state of emergency."

Explosive devices were reportedly found inside Thomas Crooks' car, according to people briefed on the investigation speaking to the Wall Street Journal.

The outlet reports the car was found near the rally in Butler, Pennsylvania.

We'll bring you more details on this when we have them.