A mother has been charged after allegedly fatally stabbing one child and seriously injuring two others in the Blue Mountains region of New South Wales, according to the Guardian.

Emergency services responded on Sunday to reports that three children and a woman had been found in a vehicle in Valley Heights with stab wounds. One child died and two others were seriously injured.

New South Wales police said bystanders who were first on the scene attempted to perform first aid while contacting triple zero.

The woman has been accused of murder and two counts of grievous bodily harm with intent to cause murder. The allegations have not been tested in court.

Separately, Treasurer Jim Chalmers was asked whether the government would support a national royal commission into violence against women and children, the Guardian reported. He said the government had chosen to increase resourcing for child and family violence and domestic violence, and told the ABC it was trying to deal with the sources of the violence, citing factors including security in the housing system and what he described as the ‘monetised misogyny’ seen online.

‘We do acknowledge that all of this violence is obviously entirely unacceptable. It’s horrific in every way,’ Chalmers said, adding that resources had been increased and that ‘we all need to do better to do everything we can to make a difference here.’