Police in Gloucestershire declared a major incident early Sunday after responding to reports of three suspicious vehicles traveling toward RAF Fairford around 12:45 a.m. local time. Officers arrested five men in the Whelford area on suspicion of violating the Explosives Act. A 400-meter cordon was established around the vehicles while the Army’s Explosive Ordnance Disposal unit conducted examinations. Approximately 85 households were evacuated to a nearby leisure center as a precaution. The incident occurred near the base, a key hub for U.S. military aircraft in the United Kingdom, including bombers and refueling tankers. RAF Fairford has previously supported combat operations, notably against Iran earlier this year. U.S. Air Force officials stated they were monitoring the situation but did not confirm any impact on base operations or force protection levels. A temporary flight restriction covering the area remains in effect through October 5. No group has claimed responsibility, and authorities have not linked the arrests to any specific threat. The British Defense Ministry and local police have not provided further details. Residents were advised the incident was contained, though the investigation remains ongoing.