Three men and a woman have been arrested in East Sussex as part of an investigation into extreme right-wing terrorism.
The arrests were carried out by specialist officers in Eastbourne and Brighton.
Police said a 27-year-old woman from Hailsham and three men from Eastbourne, aged 33, 36 and 41, were arrested.
Images show at least seven armed police with a battering ram raiding one house and handcuffing a man in a grey hoody.
The suspects are being held under the Terrorism Act while searches take place.
Assistant Chief Constable Steve Rayland it was "part of a planned operation" by Counter Terrorism Policing South East supported by Sussex Police.
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"People living in the local area may notice an increased police presence while search activity takes place, which is routine in cases of this nature," said Mr Rayland.
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