Unauthorized radio-system interference triggers Taiwan high-speed train emergency stops

On 5 April 2026, an unauthorized individual interfered with Taiwan High Speed Rail's TETRA radio communications using radio equipment and transmitted a General Alarm signal. The signal triggered emergency braking or stop procedures on multiple high-speed trains and disrupted operations for approximately 48 minutes. Public reports differ on the exact number of trains affected, so the record does not rely on a specific count.