Authorities investigating the recent terrorism scare outside the Royal Air Force Fairford base in Gloucestershire have arrested a new suspect described as a British-Iranian dual national and have begun searching properties in connection with the incident.

British Counter Terrorism Policing announced Thursday that another individual has been arrested in connection with the RAF Fairford incident “on suspicion of preparation of terrorist acts.” The new suspect, who was arrested in the Westminster borough of London, is described as a 27-year-old dual national of the United Kingdom and Iran.