Donald Trump injured in rally assassination attempt
Image: COURTESY

Former US president Donald Trump was rushed off stage during a rally in Pennsylvania after a gunman fired multiple rounds from an “elevated position” a few hours ago.

It has now been revealed that the man who attempted to kill Donald Trump is 20-year-old Thomas Matthew Crooks, according to an FBI statement.

"This remains an active and ongoing investigation, and anyone with information that may assist with the investigation is encouraged to submit photos or videos online," the statement added.

Trump said a bullet pierced the "upper part" of his right ear, in a post on social media.

One person was killed and two others were injured. All three victims are adult males, according to law enforcement

At an earlier press conference, FBI field officer Kevin Rojek confirmed that the incident was being treated as an assassination attempt.

Law enforcement officers were pressed on the response time to the gunman. State police said it’s “too early” to determine what happened as “everything unfolded very quickly”

Rojek praised the Secret Service on site and state and local partners, saying they reacted “immediately”

State police said they’re following up on reports that a witness saw the shooter on the roof.

What do we know about the alleged shooter?

He has been identified by the FBI as Thomas Matthew Crooks.

Thomas Matthew Crooks was 20 years old.

He was from Bethel Park in Pennsylvania (70km/43 miles) from Butler, the site of the attempted assassination.

The gunman was shot dead by Secret Service agents.