Nurse Megan Haines found guilty of murdering two patients with fatal insulin dose at Ballina nursing home.

A nurse has been found guilty of murdering two elderly women at a nursing home on the New South Wales far north coast.

Megan Haines killed 82-year-old Marie Darragh and Isabella Spencer, 77, who were found dead at St Andrews nursing home in Ballina in May 2014.

The jury heard both women were injected with a lethal dose of insulin hours after Ms Haines found out the pair had lodged complaints against her.

The jurors took four hours to reach their verdict in the NSW Supreme Court.

This post originally appeared on ABC News.