Tigerair plane lands safely in Melbourne

Cabin crew are being treated after a Tigerair plane landed safely at Melbourne Airport following reports of an odour in the cabin.

The flight, travelling from Brisbane, touched down just after 10am on Tuesday when the pilot requested a priority landing.

A Tigerair spokeswoman said an "unusual odour" was detected in the cabin as the plane started its descent and emergency services were on hand to meet the aircraft in Melbourne.

Melbourne Airport said the plane - Tigerair flight 511 - was at its usual parking bay and emergency services were called as part of the airport's standard procedures.

It's believed Ambulance Victoria is treating four people with concerns they were exposed to smoke or fumes.

AAP understands three cabin crew underwent a medical assessment as a precautionary measure.

All of the 70-odd passengers on board reportedly walked off the flight unassisted.

The plane will now be assessed by engineers in Melbourne.