It was not known what caused the Eurofighter Typhoon warplane to crash in the middle of a training flight, Italy's defence ministry said in a brief statement.

"The pilot quickly ejected. He is in good health and is completing medical tests at a hospital" the Italian military said.

Australian emergency responders and defence officials said the aircraft crashed near the northern city of Darwin during Exercise Pitch Black 24.

"Defence can confirm an international participant in Exercise Pitch Black 24 is safe and well after ejecting from their aircraft this morning during flying operations," an Australian defence department official said in a statement.

"All flying for the remainder of the day has been cancelled."

The Australian defence department said the crash occurred around 10.45 am local time (0115 GMT).

The pilot "made immediate contact with aircrew in the area via radio following their ejection".

Police said the plane crashed about 18 kilometres (11 miles) southwest of the rural township of Daly River, a cattle farming and fishing hub with a population of less than 500.

"The pilot has been conveyed to hospital for precautionary checks but is otherwise safe and well," Northern Territory Police said in a statement.

- War games debut -

Exercise Pitch Black, held every two years, prepares for complicated missions involving large numbers of international aircraft, according to the Australian Air Force.

The Italian Air Force was participating in the exercises for the first time.

"We are looking forward to the chance to collaborate and work with so many international partners from this area of the globe, far from our homeland," Brigadier General Filippo Nannelli said late last week.

The Italian Air Force has provided 21 aircraft for the exercises.

Northern Australia is seen as an increasingly important staging ground for war drills, offering a gateway to potential flashpoints in the Taiwan Strait and South China Sea.

However, recent multinational exercises have been plagued by deadly mishaps.

Three US Marines were killed in August last year when their Osprey aircraft crashed on a tropical island during exercises north of Darwin.

Four Australians died a month earlier when their Taipan helicopter plunged into the sea during night drills off the coast of Queensland.

The United States Marine Corps, the Japan Air Self-Defense Force, and the German Air Force were among the 20 militaries involved -- billed as the "largest iteration of the exercise in its 43-year history".