A gunman remains at large after the shooting death of US right-wing youth leader Charlie Kirk at Utah Valley University on Wednesday. Authorities have recovered a "high-powered" rifle and possess video images of the suspect.

• Victim: Charlie Kirk, a 31-year-old influential figure credited with helping Donald Trump return to the presidency.
• Weapon recovered: A high-powered bolt action rifle found in a wooded area.
• Political impact: President Trump called it a "dark moment" and suggested the left wing was responsible, pledging a wide-reaching response. Utah Governor Spencer Cox, a Republican, labeled it a "political assassination."