Multiple shots rang out at the Republican presidential candidate's rally in Butler, Pennsylvania as video showed Trump grimacing and raising a hand to his right ear.
The Washington Post is citing Butler's country district attorney as saying the shooter is also dead.
The former president had just started his speech when gunshots erupted and Trump and other rally attendees hit the deck.
Secret Service agents swarmed around him and live video showed blood on the right side of Trump's face and ear.
Donald Trump held his hand to his ear after the shots were fired at the campaign rally. (AP PHOTO)
"The Secret Service has implemented protective measures and the former president is safe," a spokesperson for the agency said on X after what it called an incident.
"This is now an active Secret Service investigation and further information will be released when available."
One witness, Ron Moose, said he heard what sounded like four shots, describing the sound as "pop, pop, pop."
Trump's campaign spokesperson said Trump was fine and that he was being checked out at a local medical facility."
"President Trump thanks law enforcement and first responders for their quick action during this heinous act. He is fine and is being checked out at a local medical facility. More details will follow," spokesperson Steven Cheung said in a statement.
Trump repeatedly raised his fist to the crowd and shouted as he was escorted to a vehicle by the US Secret Service.
Republican presidential candidate Donald Trump raising a fist to the crowd after the shooting. (AP PHOTO)
The venue was abandoned with chairs knocked over and yellow police tape around the stage.
Armed law enforcement officers were also seen on a roof near the stage where Trump was standing.
US President Joe Biden received and initial briefing on the incident, the White House said.
Congress members on both sides of American politics have expressed horror at the incident.
Trump and Biden are locked in a close election rematch, with most opinion polls including those by Reuters/Ipsos showing the two evenly matched.
Trump is due to receive the Republican nomination formally at the Republican National Convention that kicks off in Milwaukee on Monday.
Trump, who served as president from 2017-2021, easily bested his rivals for the Republican nomination early in the campaign and has largely unified around him the party that had briefly wavered in support after his supporters attacked the US Capitol on January 6, 2021, attempting to overturn his 2020 election defeat.
The businessman and former reality television star entered the year facing a raft of legal worries, including four separate criminal prosecutions.
He was found guilty in late May of trying to cover up hush money payments to a porn star, but the other three prosecutions he faces -- including two for his attempts to overturn his defeat -- have been ground to a halt by various factors including a Supreme Court decision early this month that found him to be partly immune to prosecution.
with AP
