An emergency alert warning of a real‑world active shooter was sent to Kadena Air Base in Okinawa at about 10:58 p.m. Tuesday, ordering personnel to lock down and shelter in place. The alert identified possible locations near Buildings 3515, 3560 and Building 3358. Kadena’s 18th Wing said emergency response teams arrived shortly after the alert and activated base lockdown procedures. Law enforcement officers responded to investigate the reported threat. No weapon or shooter was found, and the lockdown was lifted at 11:56 p.m., allowing normal operations to resume. Wing commander Brig. Gen. John Gallamore said the quick identification and verification demonstrated the base’s readiness. The statement added that no further details were available.