Second child dies after alleged Blue Mountain stabbing as mother faces additional murder charge

One-year-old dies after alleged attack on Sunday, while three-year-old sibling remains in critical conditionGet our breaking news email, free app or daily news podcastA baby has died in a Sydney hospital five days after a mother allegedly stabbed them and two other children in the Blue Mountains, police say.Bystanders were first on the scene after finding the three children and the 42-year-old woman with stab wounds inside a vehicle at Valley Heights in the Blue Mountains, west of Sydney, on Sun