06:48 EDT, 7 January 2021 Three teenage boys accused of bashing an elderly couple allegedly cut off the power before breaking into the home of the great-grandparents. Katie and Russell Edwards, both aged 90, were asleep when the trio turned off the main power switch before breaking into the South Lake property, in Perth's south, about 1.30am on Wednesday, Fremantle Magistrate’s Court heard. The couple woke to find the youths in hooded jumpers, who then bashed them with pot plants, leaving the frail great-grandparents covered in blood and bruises, police allege. A police prosecutor said the boys gained access to the house after removing the front fly screen before smashing a hole in a window.