CHRISTCHURCH, New Zealand — The gunman who attacked worshipers at two New Zealand mosques last year, killing 51 people and injuring 49, faced his surviving victims and relatives of the deceased in a courtroom on Monday as harrowing new details of the killing rampage emerged.

A judge this week is determining the sentence for Brenton Tarrant, who pleaded guilty in March to dozens of counts of murder and attempted murder and one count of committing a terrorist act in connection with the March 15, 2019, massacres at the Al Noor Mosque and Linwood Islamic Center in Christchurch. The 29-year-old Australian had posted white-supremacist views online and live-streamed the slaughter on Facebook.

A white supremacist who killed 51 people at two mosques in New Zealand in 2019 watched on Aug. 24 as relatives of his victims recalled the horror of the attack. (Reuters)