The US Justice Department has charged three Iran-backed operatives over a string of alleged plots in the United States and Europe, including one at an air force base in the UK. The charges were announced on 10 November.
The department said Iranian agents most recently "orchestrated a terrorist plot at an air force base in the United Kingdom", according to Just Security's account of a BBC News report.
Iran has strongly denied any involvement in the incident at Royal Air Force Fairford, BBC News reports.
The charges are allegations. The Justice Department's account of the plots has not been independently checked.
Separately, the New York Times reports that US officials have concluded that Iranian plotting against current and former US officials had reached a more advanced stage.