A police officer has died from injuries sustained while responding to a shooting outside the headquarters of the US Centers for Disease Control and Prevention (CDC) in Atlanta.

The incident, which took place on Friday near Emory University, involved a “single shooter” who is now dead, the Atlanta police department said.

It said the officer, David Rose, had been taken to hospital and later died from his injuries. No civilian was wounded in the incident.

The motive is unclear, but US media, citing an unnamed law-enforcement official, reported a theory that the gunman believed he was sick as a result of a coronavirus vaccine.