Orem(US), Sep 11 (AP) The sniper who assassinated Charlie Kirk is believed to have jumped off a roof and fled into a neighbourhood after firing one shot and has not been identified, authorities said Thursday in disclosing they have recovered a high-powered, bolt-action rifle they believe was used in the attack and are reviewing video footage of the person they believe was responsible.

The shooter appeared to be of college age and blended in on the university campus where Kirk was killed Wednesday, said Beau Mason, the commissioner of the Utah Department of Public Safety. It remained unclear how far the shooter has travelled, though law enforcement officials say nearby woods where the rifle was found have been secured.

Even as law enforcement officials revealed new details about an attack they called targeted, much remained unclear nearly 24 hours later, including the sniper's identity, motive and whereabouts. Two people detained Wednesday were released after neither was determined to be connected to the shooting, but by Thursday officials expressed confidence they had tracked the shooter's movements on campus in the run-up to it.

Later Thursday, the FBI released two photos of a person of interest in connection with the shooting as investigators appealed to the public for information. The photos show a person wearing a hat, sunglasses and a long-sleeve black shirt.

Law enforcement recovered a Mauser .30 caliber bolt-action rifle hidden in a towel in a wooded area near the university campus along what they suspect to be the shooter's path as they fled the scene, according to information circulated among law enforcement and shared with The Associated Press. Besides the spent cartridge recovered in the chamber, three other rounds were loaded in the magazine. The weapon and ammunition are being forensically analyzed by law enforcement at a federal lab for clues that could help identify the shooter or the motive.

Kirk, a close ally of President Donald Trump, was killed in broad daylight while speaking about social issues at a Utah Valley University campus courtyard. The circumstances brought renewed attention to the escalating threat of political violence in the United States that in the last several years has cut across the ideological spectrum. The killing drew bipartisan condemnation, but a national reckoning over ways to prevent political grievances from manifesting as deadly violence seemed elusive.

The attack was captured on grisly videos circulating on social media that show Kirk speaking into a handheld microphone when suddenly a shot rings out. Kirk can be seen reaching up with his right hand as blood gushes from the left side of his neck. Stunned spectators gasp and scream before people start running away.

Trump said he would award Kirk the Presidential Medal of Freedom, the highest civilian honour in the US, while Vice President JD Vance and his wife, Usha, were set to visit with Kirk's family in Salt Lake City. Vance posted a remembrance on X chronicling their friendship, dating back to initial messages in 2017, through Vance's Senate run and ultimately praying after hearing of the shooting. Kirk played a pivotal role in setting up Trump's second Republican administration, Vance wrote.

“So much of the success we've had in this administration traces directly to Charlie's ability to organize and convene,” Vance wrote. “He didn't just help us win in 2024, he helped us staff the entire government.” Kirk was taking questions about gun violence Kirk was speaking at a debate hosted by his nonprofit political youth organization, Arizona-based Turning Point USA, at the Sorensen Center courtyard on campus. Immediately before the shooting, he took questions from an audience member about gun violence.

“Do you know how many transgender Americans have been mass shooters over the last 10 years?” the person asked. Kirk responded, “Too many.” The questioner followed up: “Do you know how many mass shooters there have been in America over the last 10 years?” “Counting or not counting gang violence?” Kirk asked.

Then a shot rang out.

The shooter, who Gov. Spencer Cox pledged would be held accountable in a state with the death penalty, wore dark clothing and fired from a building roof some distance away.

Madison Lattin was watching a few dozen feet from Kirk's left when she heard the bullet hit him.

“Blood is falling and dripping down, and you're just like so scared, not just for him but your own safety," she said.

She saw people drop to the ground in an eerie silence pierced immediately by cries. She and others ran. Some fell and were trampled in the stampede.

When Lattin later learned that Kirk had died, she wept, she said, describing him as a role model who had showed her how to fight for the truth.

Trump calls Kirk a martyr for truth' About 3,000 people were in attendance, according to a statement from the Utah Department of Public Safety. The university police department had six officers working the event, along with Kirk's own security detail, authorities said.

Trump announced Kirk's death on social media and praised the 31-year-old co-founder and CEO of Turning Point as “Great, and even Legendary.” Later, he released a video in which he called Kirk a “martyr for truth and freedom." Utah Valley University said the campus was evacuated after the shooting and will be closed until Monday.

Meanwhile, armed officers walked around the neighborhood bordering the campus, knocking on doors and asking for any information residents might have on the shooting. Helicopters buzzed overhead.

Wednesday's event, billed as the first stop on Kirk's “The American Comeback Tour,” had generated a polarizing campus reaction. An online petition calling for university administrators to bar Kirk from appearing received nearly 1,000 signatures. The university issued a statement last week citing First Amendment rights and affirming its “commitment to free speech, intellectual inquiry, and constructive dialogue.” Last week, Kirk posted on X images of news clips showing his visit was sparking controversy. He wrote, “What's going on in Utah?” Condemnation from across the political spectrum The shooting drew swift bipartisan condemnation as Democratic officials joined Trump, who ordered flags lowered to half-staff and issued a presidential proclamation, and other Republican allies of Kirk in decrying the violence.

“The murder of Charlie Kirk breaks my heart. My deepest sympathies are with his wife, two young children, and friends,” said Gabrielle Giffords, the former Democratic congresswoman who was wounded in a 2011 shooting in her Arizona district.

In a joint statement, the Young Democrats of Connecticut and the Connecticut Young Republicans called the shooting “unacceptable.” “There is no place in our country for such acts regardless of political disagreements,” they said.

The shooting appeared poised to become part of a spike of political violence that has touched a range of ideologies and representatives of both major political parties. The attacks include the assassination of a Minnesota state lawmaker and her husband at their house in June, the firebombing of a Colorado parade in June to demand Hamas release hostages and a fire set at the house of Pennsylvania's governor, who is Jewish, in April. The most notorious of these events is the shooting of Trump during a Pennsylvania campaign rally last year. (AP) RD RD