Authorities in Australia have said Erin Patterson attempted to poison her husband on multiple occasions before serving a deadly mushroom meal that killed three people.

The estranged husband of a woman convicted of killing three people​ with a meal laced with deadly mushrooms suspected his wife had been poisoning him before the fatal meal, an Australian court has heard.

An Australian court has heard a husband suspected his wife of poisoning him over a year before she murdered three of his relatives with toxic mushrooms.