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.

The vessels were sailing in the Tasman Sea, and their announced intent to perform exercises prompted a call for commercial flights to divert course.

Airlines have been contacted by Australia’s air traffic control agency warning them of reports of live fire off the country’s east coast where a Chinese navy task group has been operating, the agency and Australian officials said.