The Federal Bureau of Investigation (FBI) has named Thomas Matthew Crooks as the gunman who fired shots at the rally of former President Donald Trump.

According to the FBI, Crooks is a 20-year-old male from Bethel Park, Pennsylvania.

The former US president was injured in the shooting while he was delivering a speech at his campaign rally on Saturday.

The FBI has described the incident as an assassination attempt.

Although Trump survived the shooting, one person was killed while two others were gravely injured.

“The FBI has identified Thomas Matthew Crooks, 20, of Bethel Park, Pennsylvania, as the subject involved in the assassination attempt of former President Donald Trump on July 13, in Butler, Pennsylvania,” the bureau said on Sunday.

The FBI also shared a phone number and website for anyone with information, video, or pictures related to the shooting.

Kevin Rojek, special agent in charge of the FBI’s Pittsburgh office, said the website for tips is www.FBI.gov/Butler.

Following the shooting, Trump returned to New Jersey, with his plane touching down early on Sunday morning.

Several world leaders have condemned the attack and expressed sympathy with the Republican Party candidate for the US presidential election.

Australian Prime Minister Anthony Albanese called the shooting an “inexcusable attack”.

Ukraine President Volodymyr Zelensky said he was “appalled”, adding that such “violence has no justification and no place anywhere in the world”.

Narendra Modi, India’s prime minister, expressed concern over the incident, saying “our thoughts and prayers are with the family of the deceased, those injured and the American people”.