Four people have been arrested on suspicion of conspiracy to defraud, conspiracy to launder money and possession of an explosive.
The two men and two women were detained as part of an investigation led by the Metropolitan Police's new Cyber Crime Unit.
The men are currently in custody at a central-London police station and the women have been bailed to return on a date early next year.
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ITV News visits the county in the wake of the EU referendum result and finds increasing frustration with Britain's political leaders.
The schoolchildren rescued from the Brecon Beacons during a Duke of Edinburgh exercise were never missing, their headteacher has insisted.
"By killing his children, Mr Sheats will have to live the rest of his life with this horrible memory."