Australian university professor and scientist Lily Pereg and her sister have been found dead after disappearing more than two weeks ago in Argentina.
54 year old Dr Pereg, a microbial ecologist at the University of New England, and her sister, 63 year old Israeli citizen Pyrhia Sarusi, were last heard from on January 11 after travelling to the country to visit Ms Sarusi's son.
Their bodies were found on a lot beside the home of Ms Sarusi's son Gilad Pereg, near the city of Mendoza on Saturday.
Authorities assigned to the case confirmed Mr Pereg has been arrested on homocide charges, and they are still waiting on autopsy results.