Taiwan says China set up ‘live-fire training’ zone off its coast without warning

China’s military has set up a zone for “live-fire training” about 46 miles (74 kilometers) off the southwestern coast of Taiwan without advance notice, the island’s defense ministry said on Wednesday.

It comes a day after Taiwan’s coast guard detained a Chinese-crewed cargo ship suspected of cutting an undersea cable in the Taiwan Strait.

Taiwan’s defense ministry said it detected 32 Chinese military aircraft in the Taiwan Strait starting shortly before 9am on Wednesday (7.42 p.m. Tuesday ET). It added that 22 of those aircraft flew near the north and southwest of the island and carried out a “joint combat readiness patrol” with Chinese warships, according to the statement.

“During this period, (China) blatantly violated international norms by unilaterally designating a drill zone approximately 40 nautical miles off the coast of Kaohsiung and Pingtung without prior warning, claiming it would conduct ‘live-fire training,’” the ministry said.

There was no immediate comment from Beijing on the Taiwan statement. China’s Foreign Ministry did not comment on it when asked at a regular news conference Wednesday, saying it’s “not a diplomatic issue.”

China’s ruling Communist Party claims Taiwan as its territory, despite having never controlled it, and has vowed to take the self-governing democracy by force if necessary. Under Chinese leader Xi Jinping, Beijing has significantly ramped up military, diplomatic and economic pressure on Taiwan.

Kaohsiung, a strategic commercial hub for Taiwan, is home to the island’s largest and busiest port.

Taiwan’s defense ministry said China declared the drill zone within international shipping lanes via temporary radio broadcasts, posing “a severe threat to the safety of international aviation and maritime navigation.”

“This is a blatant provocation against regional security and stability,” the ministry added.