President Donald Trump delivered a solemn Oval Office address Wednesday night after conservative influencer Charlie Kirk was fatally shot while speaking at an event on a Utah college campus, calling the killing "a dark moment for America" and urging an end to political demonization.

Kirk, 31, the founder of Turning Point USA, was shot during a question-and-answer session at Utah Valley University in Orem and later died, Trump announced on his social platform Truth Social. Law enforcement officials, including FBI and ATF agents, were dispatched to the scene and said they were monitoring reports and supporting the local response.

In a roughly four-minute video posted to Truth Social from the Oval Office, Trump described Kirk as "a patriot" who "devoted his life to the cause of open debate" and said he had been "filled with grief and anger" at the killing. Trump attributed the shooting to a climate of political demonization and repeated his call for Americans and the media to confront rhetoric that he said has encouraged violence.

"It's long past time for all Americans and the media to confront the fact that violence and murder are the tragic consequences of demonizing those with whom you disagree," Trump said, adding that rhetoric from the "radical left" had compared conservatives to Nazis and other extreme figures. The president also referenced past attacks and an assassination attempt on his life while urging officials to find "everyone involved with Kirk's killing and all political violence."

Video taken at the scene showed Kirk being struck in the neck and spectators reacting in shock. A crowd member had stepped up to the microphone to challenge Kirk during the event, witnesses said. Former Rep. Jason Chaffetz, a Utah Republican who was at the event, told Fox News the exchange followed a question about transgender shooters. Chaffetz said he saw Kirk fall backward immediately after the shot.

Authorities did not immediately release the name of a suspect or confirm a motive, and investigators cautioned the public as they worked to secure the scene and gather evidence. Attorney General Pam Bondi, who said she was returning from an event in Chicago when she learned of the shooting, posted that FBI and ATF agents were on the scene and urged prayers for Kirk.

Trump posted earlier on Truth Social that "The Great, and even Legendary, Charlie Kirk, is dead," and the White House subsequently ordered flags at the White House lowered to half-staff. Vice President J.D. Vance posted on X that his sympathies were with Kirk's family and urged prayers.

Kirk leaves behind his wife, Erika Frantzve, and two young children, according to statements from allies and social posts. Turning Point USA described Kirk as a prominent campus conservative who had been scheduled to debate progressive commentator Hasan Piker at Dartmouth College later this month.

Reaction from political leaders spanned the partisan divide with calls to reject political violence. California Gov. Gavin Newsom condemned the attack as "disgusting, vile, and reprehensible" and said political violence must be rejected in every form. Rep. Alexandria Ocasio-Cortez warned that Kirk's killing "risks an uncorking of political chaos and violence," while Rep. Marjorie Taylor Greene, a family friend, urged that the country "rise up and end this." Progressive commentator Hasan Piker, who had been slated to face Kirk at a future debate, said on his Twitch stream that the incident was "terrifying" and urged followers not to celebrate or seek vengeance.

Several Republican members of Congress and conservative allies posted condolences and recounted scenes from the event. Rep. Brian Mast and Rep. Cory Mills said they were praying for Kirk and called the shooting horrific. Some social media users reportedly celebrated the attack, drawing swift condemnation from lawmakers.

Officials said they were continuing to investigate and that more information would be released as the inquiry progressed. FBI Director Kash Patel said the bureau was "closely monitoring reports" and that agents stood in full support of the ongoing response and investigation. Local law enforcement also appealed for witnesses and video to aid the probe.

The shooting and the president's subsequent address intensified debate over political rhetoric and campus safety as investigators work to determine what led to the attack and whether others were involved. Authorities asked anyone with information to contact investigators as they continue to piece together the events that led to the fatal shooting.