US forces responded to possible drone activity over a military base in Britain, a US Air Force spokesperson said, in the latest security incident at a facility hosting American military aircraft.
"No personnel, aircraft or infrastructure were affected" at the RAF Lakenheath base, the Air Force spokesperson said in a statement.
In an interview broadcast Wednesday, Iranian security chief Mohsen Rezaei threatened to strike US bases beyond the Middle East, including in Europe, if they are used for attacks against Tehran.
Iranian officials have previously threatened to expand the geographic scope of the conflict should the US attack again.
In late September, an adviser to Iran's new supreme leader Mojtaba Khamenei publicly mused that the war could "expand even further, reaching the Indian Ocean and perhaps beyond."