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. Sussex news site The Argus reported the location as Langney Rise.
The suspects are being held under the Terrorism Act while searches take place.
Read more from Sky News:
Police evacuate homes and make explosives arrests
Earthquake recorded in the North West
Assistant Chief Constable Steve Rayland it was "part of a planned operation" by Counter Terrorism Policing South East supported by Sussex Police.
"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.
(c) Sky News 2025: Four arrested in Eastbourne and Brighton in right-wing terror investigation
Nigel Farage launches tirade at BBC over allegations he was racist at school
Salisbury novichok poisonings: Putin 'morally responsible' for woman's death after authorising botched spy assassination bid
Starmer wants to lift half a million children out of poverty - but does his plan go far enough?
Number of flu patients in hospital beds across England rises by more than 50%
Derby police evacuate around 200 homes as men arrested on suspicion of explosives offences
On Air