Baby dies in hospital days after crash that killed mum, brother in southern Sydney
A three-month-old baby who was the sole survivor of a horror crash that killed a young mum and a toddler in Sydney's south earlier this week has died in hospital.
Katrina Sila was driving on the Hume Motorway at Menangle Park when she attempted a U-turn and collided with a cement truck on Monday morning.
Both Sila and her two-year-old son died at the scene, while her baby daughter was taken to Westmead Children's Hospital.
READ MORE: Baby fights for life after mother and toddler killed in Sydney crash
Katrina Silva (right) and her two children died in a crash at Menangle Park, south of Sydney. Nine
First responders earlier stated it was a miracle anyone had survived the wreckage, from "such a tragic, high-speed incident".
Despite doctors' efforts over the last two days, the newborn died in hospital this morning, police confirmed.
The truck driver was not injured. 9News
The truck driver was not injured and has been taken for mandatory testing.
Police are investigating the cause of the crash and will prepare a report for the Coroner.
Anyone with dashcam footage of the incident is urged to come forward.
The horror crash at Menangle. 9News
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