A BBC television panel segment that included Democratic strategist Joi Chaney during rolling coverage of the fatal shooting of conservative commentator Charlie Kirk drew sharp criticism from viewers on social media, officials and commentators said.

The clip, which was widely shared online, showed Chaney saying she would "contemplate" sharing a post by former President Donald Trump and adding, "He wasn't admired and loved by all," accompanied by what some viewers described as a laugh. The BBC presenter and another panellist were visibly taken aback and audible gasps were heard in the studio before the discussion continued. The broadcaster was approached for comment.

The programme exchange became a flashpoint in a broader online reaction to the killing, with critics saying the remark and the tone were disrespectful while others argued the clip showed the complexities of public reaction to polarising figures. Left-wing activist Femi Oluwole also faced backlash after a post linking mourning for Kirk to broader debates over the Israel–Gaza conflict, and some users criticised Labour politicians who posted tributes to Kirk.

Brendan Cox, whose wife, Labour MP Jo Cox, was murdered in 2016, told the Mail he had been alarmed by some online responses and urged political figures and commentators in the United States to "tone down the temperature, rather than turn it up even further." Cox, who criticised trolls celebrating the killing, praised senior Democrats for condemning the attack but said the polarised online climate risked inflaming tensions.

The shooting occurred on a university campus in Utah while Charlie Kirk was speaking to students about mass shootings, according to law enforcement and video shared online. Video circulated by witnesses shows a figure on a nearby rooftop just before a single shot struck Kirk in the neck. He collapsed immediately and was later pronounced dead. Authorities said the incident happened shortly after noon local time while Kirk was answering a question about the involvement of a transgender individual in past shootings.

Utah Governor Spencer Cox described the event as "a political assassination" at a news conference but did not disclose what evidence led authorities to that conclusion. He said investigators had a person of interest in custody for questioning; the individual was later released after an interrogation, FBI Director Patel said. Two other people who were briefly detained were also released while the FBI and local police continue to investigate and search for the suspected shooter.

Officials and attendees criticised event security, with some saying there were no checkpoints, bag checks or metal detectors at the venue. Video from inside a campus building showed panicked crowds and an apparent figure sprinting across the rooftop moments after the shot.

President Donald Trump paid tribute to Kirk on social media hours after the shooting, calling him "legendary" and ordering flags on government buildings to be flown at half-staff. Utah authorities said the suspect, if identified and prosecuted, could face the death penalty.

Kirk, a prominent conservative commentator and founder of Turning Point USA, is survived by his wife, Erika Frantzve, their three-year-old son and a 16-month-old daughter, according to statements from his organisation and coverage of the family.

The incident has intensified debate in the United Kingdom and the United States over political speech, public safety and the tone of online discourse. Critics on both sides of the political divide said the killing highlighted dangers posed by extreme rhetoric and the ready circulation of dehumanising commentary online, while supporters of Kirk urged unity and sympathy for the family.

Social media users criticised both the BBC for the on-air exchange and individuals who they said had reacted insensitively online. Others cautioned that commentary in the immediate aftermath of a violent crime can be inflammatory and urged patience until law enforcement completes its investigation.

Investigators have not released a motive and have not named a suspect in custody. The FBI said its investigation is ongoing and pledged to provide updates in the interest of transparency. Law enforcement asked anyone with information or relevant video to contact federal or local authorities as they continue to search for the person who fired the shot.