Australia learned about Chinese live-fire naval drills off the country’s coast that forced dozens of flights to be diverted via an alert from a commercial pilot, authorities said on Monday.

Australia's Foreign Minister Penny Wong raised concerns with her Chinese counterpart on Friday over inadequate notice given by the Chinese navy of a rare live-fire exercise in international waters between Australia and New Zealand that forced airlines to divert flights.

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New Zealand raised fresh concerns Monday over nearby live-fire drills conducted by Chinese warships armed with “extremely capable” weapons, an unprecedented show of firepower last week that analysts say are part of Beijing’s ongoing plan to build a blue-water navy with global reach.

New Zealand said the Chinese navy conducted a live-fire exercise in international waters near the Pacific nation on Saturday, a day after it held a similar drill between Australia and New Zealand that forced airlines to divert flights.

Leaders in Australia and New Zealand say China should have given them more warning before its navy conducted an unusual series of live fire exercises in the seas between the two countries, forcing flights to divert on short notice.