Five arrested on terrorism charges after explosives found near RAF base used by US

Counter-terrorism police investigate whether Iran is behind suspected bomb plot after member of public calls 999 over suspicious vehicles

Counter-terrorism police are investigating whether Iran is behind a suspected bomb plot after armed officers found explosives on three vans parked minutes from an RAF base used by the US military.

The Guardian understands that after five men were arrested on terrorism charges, investigators were examining materials found in the vans, with an initial view being they were consistent with improvised explosive devices.