Image grab from a self-shot video that was streamed on Facebook Live on March 15, 2019 by a man who was involved in two mosque shootings in Christchurch. (HANDOUT / AFP) / — CHRISTCHURCH, NEW ZEALAND – MARCH 15: A floral tribute is seen on Linwood Avenue near the Linwood Masjid on March 15, 2019 in Christchurch, New Zealand. 49 people have been confirmed dead and more than 20 are injured following attacks at two mosques in Christchurch. Four people are in custody following shootings at Al Noor mosque on Dean’s Road and the Linwood Masjid in Christchurch. Mosques across New Zealand have been closed and police are urging people not to attend Friday prayers as a safety precaution. (Photo by Kai Schwoerer/Getty Images) Sound The gallery will resume inseconds SYDNEY, AUSTRALIA – MARCH 15: Australian Prime Minister Scott Morrison speaking at Kirribilli House on March 15, 2019 in Sydney, Australia. Four people are in custody following mass shootings at two mosques in Christchurch, New Zealand. 40 people are confirmed dead and 20 others injured in the attacks that occurred at Al Noor mosque and the Linwood Masjid. (Photo by James Gourley/Getty Images) CHRISTCHURCH, NEW ZEALAND – MARCH 15: Police…