
This piece has been updated in light of recent developments. On 6 October, North Korea fired another two ballistic missiles into the waters off the Korean Peninsula, its sixth such weapons test in less than two weeks.
For the first time in five years North Korea has fired a ballistic missile over Japan. At around 7:30am today (4 October) sirens sounded across several Japanese prefectures and emergency alerts on mobile phones and local radio stations urged residents to take shelter. “North Korea appears to have launched a missile,” the message said. “Please evacuate into buildings or underground.”