Forty-nine people have been killed and at least 20 wounded in shootings at two mosques in Christchurch, New Zealand.
Australian Prime Minister Scott Morrison described an alleged gunman, who had Australian citizenship, as an “extremist, right-wing” terrorist.
A man in his late twenties was charged with murder and will appear in court on Saturday morning, police confirmed.
Two other men and one woman were detained nearby and firearms seized, Police Commissioner Mike Bush said.
He said police had determined that one of the people detained was not involved in the incident, and officers were working to understand if the other two were connected.
The gunman appeared to have live-streamed footage of his rampage to Facebook, filmed with a head-mounted camera.
The footage appeared to show him firing indiscriminately at men, women, and children from close range inside the Al-Noor mosque.
Police called on the public not to share the “extremely distressing” footage online.
Facebook said it had removed the gunman’s Facebook and Instagram accounts and was working to remove any copies of the footage.