Three people have died after a botched Optus network upgrade on Thursday prevented around 600 emergency calls to Triple Zero across South Australia, WA and the Northern Territory.

South Australian police confirmed the deaths linked to the outage — which Optus only revealed on Friday evening at a press conference — included an eight-week-old baby and a 68-year-old woman.

On Saturday, Premier Roger Cook revealed the deaths include two Perth men, aged 49 and 74.

The outage — plus Optus’s delayed response to it — has sparked fury and condemnation.

Mr Cook said he expected Optus would face “serious legal ramifications”, while SA Premier Peter Malinauskas said he had “not witnessed such incompetence from an Australian corporation in respect to communications worse than this.”

This isn’t the

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