U.S. right-wing activist and commentator Charlie Kirk, an influential ally of President Donald Trump, was fatally shot in the neck on Wednesday during an event at a Utah university that the governor described as a political assassination.

Authorities had yet to publicly identify a suspect some six hours after the shooting. No suspect was in custody, U.S. media reported, citing law enforcement sources.

FBI Director Kash Patel said an unnamed person had been detained for questioning, then released.