An Australian national has been charged with murder... following the deadliest terror attack in New Zealand's history.<br /> 28-year-old Brenton Tarrant appeared at Christchurch District Court on Saturday morning.<br />He's accused of killing 49 people and injuring 48 people... in a deadly shooting incident that took place at two mosques.<br />After a minute-long session,... the court ordered Tarrant to return on April 5th.<br />Right now, he faces only one murder charge,... but police say that more charges may be coming.<br />According to New Zealand Prime Minister Jacinda Ardern,... three people including the suspect are now in custody,... with investigations ongoing as to whether the other two were directly involved.<br />A fourth person was also arrested,... but was released after it was revealed he was in possession of firearms to assist police. <br />