Former President Donald Trump, the presumed 2024 Republican presidential nominee, was swept away at a rally in Butler County, Pennsylvania, on Saturday after an intense security event.

In images broadcast on live television, Trump was speaking to a crowd for a brief time before apparent loud pops or blasts were heard before the former president appeared to grab the right side of his head or his right ear before ducking below the lectern as he was on stage.

People at the event said they had stood in line for hours to get a place at the rally before something that “sounded like fireworks” were heard to the side of the bleachers. People in the crowd started to scream before the Secret Service quickly took Trump away to a motorcade and sped away.

The crowd was asked to evacuate shortly after.

“An incident occurred the evening of July 13 at a Trump rally in Pennsylvania,” said Secret Service spokesperson Anthony Guglielmi. “The Secret Service has implemented protective measures and the former President is safe. This is now an active Secret Service investigation and further information will be released when available.”

A Biden administration spokesperson confirmed that President Joe Biden, Trump’s likely opponent in this November’s presidential election, has been briefed on the incident.

“Take a look at that, so that arrow is the lowest amount of illegal immigration in recorded history into our country,” Trump said moments before the incident.

“And then the worst president in the history of our country took over and look what happened to our country. Probably 20 million people, and you know that’s a little bit old that chart. That chart is a couple of months old. And if you really want to see something that’s sad, take a look at what happened,” Trump said as at least four pop sounds were heard and Secret Service agents surrounded Trump.

This is a developing story and will continue to be updated.