A mum killed her three 'beautiful' children before taking her own life at home.  Katie Perinovic and her daughters Claire, seven, and Anna, five and son Matthew, three, were discovered inside their home on Thursday afternoon.  Devastated husband Tomislav, 48, made the horrifying discovery in the family's Melbourne home before making the call to emergency services.  Police said: "Investigators do not believe the 48-year-old man was involved in the incident and police are not looking for anyone further in relation to the matter.  “Homicide Squad investigators have formed the preliminary view that the 42-year-old woman is responsible for all four deaths and on completion of their investigation, a report will be provided for consideration of the coroner.”  Neighbours told of their shock after some had spoken to Katie just hours before.  Daniel and Vicky Schembri, residents in the same street said Katie has dropped off some groceries at their door the day befoe.  Mr Schembri said: "She knocked on the day around 5.30 in the afternoon, I said ‘thank you very much’, and she said ‘bye’,"  The shocked neighbour said it “breaks my heart” to think of the three kids wishing them a happy new year, eating lollies, just two weeks ago, reports news.com.au.  Tributes left at the scene include flowers, toys and handwritten notes.  One heartbreaking note from a child read; "To Claire, Anna, Matt and Katie. You always are very nice, loving, caring and Claire was my bff (best friend forever) always. Love from Anabelle."  Acting Deputy Commissioner Robert Hill said police would work to support the families of those involved and ensure they get the help they need.  “I know there will be many people in the community struggling to understand and come to terms with this tragedy,” he said.  “This has also been an incredibly difficult time for both the police and paramedics, who responded and attended the scene yesterday.  “This has been an incredibly heart wrenching experience for all concerned.”  Acting Deputy Commissioner Robert Hill said police would work to support the families of those involved and ensure they get the help they need.  “I know there will be many people in the community struggling to understand and come to terms with this tragedy,” he said.  “This has also been an incredibly difficult time for both the police and paramedics, who responded and attended the scene yesterday.  “This has been an incredibly heart wrenching experience for all concerned.”

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