The gunman who shot dead US right-wing youth leader Charlie Kirk in a targeted killing remained at large Thursday but authorities said they have video images of the suspect and have recovered a “high-powered” rifle.

Kirk, a 31-year-old superstar on the Republican right who was credited with helping Donald Trump return to the presidency last year, was shot while addressing a large crowd at Utah Valley University on Wednesday.

The killing, described by the FBI as a “targeted event” — shocked a nation already reeling from political tensions half a year into Trump’s second term.

Authorities acknowledged the gunman remained at large after having escaped into woodland.

“We’re doing everything we can to find him, and we’re not sure how far he has gone yet, but we will do our best,” FBI Special Agent Robert Bohls told a media briefing.

Authorities said they had secured quality images of the killer, who was of university age.

“We do have good video footage of this individual. We are not going to release that at this time,” said Beau Mason, commissioner of the Utah Department of Public Safety.

Bohls said the presumed murder weapon had also been found.

“It is a high-powered bolt-action rifle. That rifle was recovered in a wooded area where the shooter had fled,” the FBI agent said.

Two people initially detained for questioning were released after officials determined they had no connection to the shooting.

Reflecting the intensely political nature of the incident, it was Trump, rather than law enforcement authorities, who first announced to Americans that Kirk had died from his wound.

Trump then addressed the nation in a video address on social media in which he cited a “dark moment for America.”