By Sam Sherwood of RNZ A man has pleaded not guilty to murdering a mother and her two children following an incident at a property in Hastings. A homicide investigation, dubbed Operation Train, was launched after emergency services were called to a property on Avenue Rd East, about 6am on April 19, after reports of several people being seriously injured. Three people died - a woman and her two children, a 3-month-old girl and a 17-month-old girl. A 36-year-old man has been charged with murdering them. The man appeared before Justice Karen Grau in the High Court at Napier today. Through his lawyer he pleaded not guilty to the charges. A trial date has been set for three weeks from August 30, 2027. Justice Grau continued an interim suppression order until his next appearance on July 9. The man was remanded in custody. Coroner Bruce Hesketh earlier granted an interim non-publication order in relation to the names, or any particulars likely to lead to the identification, of any of the four people.…