A flight was turned back to Sydney International Airport within hours of departing. -AAP Image
An emergency incident is unfolding at Sydney International Airport after a flight was turned back within hours of departing.
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The Australian Federal Police was called to the airport on Monday evening to respond to the incident, a spokeswoman confirmed.
"An update will be provided at an appropriate time," the spokeswoman said.
There are reports a passenger is being unruly inside a plane stopped on the tarmac.
Malaysia Airlines flight MH122 left for Kuala Lumpur at 1.06pm but landed back on the Sydney runway at 3.47pm, flight tracking website FlightAware shows.
An airport spokesman said emergency agencies were being supported in their management of the incident.
"The airport is operational with flights arriving and departing," the statement said.
"Passengers are encouraged to check directly with their airline regarding the status of their flight."
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