A 30-year-old woman has been charged with the attempted murder of her newborn son who was allegedly abandoned in a roadside drain for five days before passers-by heard his cries.

Police in Australia have questioned but not charged a 30-year-old woman whose newborn baby boy was found abandoned in a drain near a Sydney motorway.

A 30-year-old woman whose newborn baby was found abandoned in a drain near a Sydney motorway is being questioned by Australian police.