A massive manhunt is under way for a sniper who assassinated Charlie Kirk, a conservative activist and close ally of President Donald Trump, in the latest act of political violence in America.
Kirk was killed by a single gunshot fired from a distant rooftop at the Utah Valley University campus, where he was speaking on Wednesday.
Federal, state and local authorities said they were working on Thursday on “multiple active crime scenes”.
As the search stretched into a second day, they provided little information about the killer’s identity, motive, location or evidence and were reviewing grainy security videos of a mysterious person in dark clothing.
“This is a dark day for our state. It’s a tragic day for our nation,” said Utah Governor Spencer Cox.
“I want to be very clear, this is a political assassination.”
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” and blamed the rhetoric of the “radical left” for the killing.
Later, he released a recorded video from the White House in which he called Kirk a “martyr for truth and freedom”.

Two people were detained on Wednesday, but neither was determined to have had any connection to the shooting, and both have been released, Utah public safety officials said.
The shooting drew renewed attention to an escalating threat of political violence in the United States that in the last several years has cut across the ideological spectrum.
The assassination drew bipartisan condemnation, but a national reckoning over ways to prevent political grievances from manifesting as deadly violence seemed elusive.
Videos posted to social media from Utah Valley University show Kirk speaking into a handheld microphone while sitting under a white tent emblazoned with the slogans The American Comeback and Prove Me Wrong.
A single shot rings out and Kirk can be seen reaching up with his right hand as a large volume of blood gushes from the left side of his neck.
Stunned spectators are heard gasping and screaming before people start to run away.
Kirk was speaking at a debate hosted by his non-profit political organisation.
Immediately before the shooting, Kirk was taking questions from an audience member about mass shootings and 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 ten years?”
“Counting or not counting gang violence?” Kirk asked.
Then a single shot rang out.
The assailant, who Mr 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 to the courtyard where the event took place.
Some 3,000 people were in attendance, according to a statement from the Utah Department of Public Safety, which also said the university police department had six officers working at the event along with Kirk’s own security detail.
Utah Valley University said the campus was immediately evacuated and remained closed.
Classes were cancelled until further notice.
Those still on campus were asked to stay in place until police officers could safely escort them off campus.
Armed officers walked around the neighbourhood bordering the campus, knocking on doors and asking for information on the assailant.
Officers were seen looking at a photo on their phones and showing it to people to see if they recognised a person of interest.
The event, billed as the first stop on Kirk’s The American Comeback Tour, had generated a polarising campus reaction.
An online petition calling for university administrators to bar Mr 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”.
The shooting drew swift condemnation across the political aisle as Democratic officials joined Mr Trump, who ordered flags lowered to half-mast and issued a presidential proclamation, and Republican allies of Mr Kirk in decrying the violence.
“The attack on Charlie Kirk is disgusting, vile, and reprehensible,” Democratic California Governor Gavin Newsom, who last March hosted Kirk on his podcast, posted on X.
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 parties.
The attacks include the assassination of a Minnesota state politician and her husband at their house in June, the firebombing of a Colorado parade 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 campaign rally last year.
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