British counter-terrorism police on Thursday arrested a 27-year-old British-Iranian dual national in London on suspicion of preparing acts of terrorism, as part of an investigation into an incident near RAF Fairford over the weekend. Police also questioned another 26-year-old British citizen. Previously, five men had been arrested and bailed in connection with the incident. UK Prime Minister Andy Burnham had stated there were "strong indications" of Iranian involvement, but Iran denied the allegations.