TOKYO, June 11 — Japan extended its alert on ballistic missile defences today despite the expiration of North Korea’s deadline for launching a satellite had passed.

Japan put its ballistic missile defences on alert last month and vowed to shoot down any projectile it deemed to threaten its territory, after North Korea notified Japan it planned to launch a satellite between May 31 and midnight on Saturday night.

"Japan will keep its order regarding the ballistic missile defences for the time being,” the Ministry of Defence said in a brief statement that did not provide a reason.

North Korea last month informed the International Maritime Organisation of the schedule of its planned satellite launch.

North Korean launched a satellite on May 31 that ended in failure, sending the booster and payload plunging into the sea, according to North Korean state media. — Reuters