Taiwanese troops are reported "preparing for war" after air defences were briefed. Reports have emerged that leave has been cancelled for some officers and military.
Military exercises have been seen in operation across the island. These have included land, sea and air drills in the Han Kuang exercise where forces simulated what would happen if China invaded the island.
According to The Mirror the move comes amid concerns over a visit to the region by US House of Representatives Speaker Nancy Pelosi. She is due to begin a tour of four Asian countries on Monday.