The two-month-old infant suffered a “medical episode” on board the almost six-hour flight. An AirAsia spokesman confirmed the death on board flight D7236, ABC news reported. The death is currently under investigation while a report is prepared for a coroner.
Western Australia (WA) police and medical specialists met the plane at Perth International Airport.
A WA police spokesman said there was nothing to suggest there were any suspicious circumstances surrounding the baby’s death.
Details of how the baby died are still unknown.
An AirAsia spokesman told ABC news: “We are unable to comment further on the infant’s medical situation, however our thoughts are with the infant and family involved.”
Officials were seen this morning carrying large brown evidence bags from the aircraft.
An airport staff member was seen taking a pram off the plane.
The same plane was meant to return to Kuala Lumpur at 6.50am Australian Western Standard Time (AWST) (11.50pm BST) but was delayed due to the emergency.
The plane was still on the tarmac at 9.30am AWST (3.30am BST).
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An AirAsia spokesman apologised for any inconvenience caused by the delay.
They added the airline would help travellers re-book flights.
The news comes less than a year after a dead baby was found abandoned inside the toilet of an AirAsia India flight that landed in New Delhi.
A 19-year-old woman on board the flight admitted she had given birth and acknowledged that she had delivered the baby.