Four men have been arrested in Co.Antrim following searches into so called 'Suspicious activity'.
Detectives say a number of individuals appear to have extreme right wing views about tensions in North Eastern Europe.
A number of people have been involved in "suspicious activity" in a Country Antrim forest.
Police have stressed it's not linked to suspected Dissident Republican terror hides at Carnfunnock Country Park and Capanagh Forest earlier this year.
The men, who are aged 29, 30, 36 and 46, were detained at houses in Ballymena and Coleraine earlier today.
They've been taken to a police station in Belfast for questioning.
Jury sworn in for Noah Donohoe inquest
Sharing of explicit AI images in Armagh school being investigated by police
Long-awaited inquest into death of Belfast schoolboy Noah Donohoe due to start
Murder investigation launched following death of man in Coleraine
Man arrested over threats to elected representatives