Millions of people in Taiwan were forced indoors and mobile internet speeds slowed for 30 minutes on Thursday during a simulation of a Chinese attack on the island democracy.

Critics question value of tests as authorities aim to prepare public for outages caused by war, cyberattacks or natural disaster.

Taiwan has launched its first mobile network slowdown exercise, a new civil defense measure designed to prepare the population for possible communication disruptions in the event…

‘Blockade by fire’ could cut off supplies to the island while minimising disruption to others