An address in the Dyfed Powys force area was raided on Wednesday as part of an investigation into allegations of bribery, fraud and money laundering that involved a raid on a Unite union official's office.

The union official is being investigated by police, and it is understood that a number of officers from South Wales Police were involved in the operation, at Unite’s London head office, on Wednesday.

A Unite spokesperson said: “A Unite employee is now subject to a criminal investigation by the police.

“On Wednesday April 6 the employee’s office was accessed and searched by the police under warrant.”

South Wales police said in a statement: “South Wales Police has executed warrants as part of an investigation into allegations of bribery, fraud and money laundering.

“The warrants were executed on Wednesday 6th April at addresses in the South Wales, Metropolitan, Merseyside, Cheshire, North Wales, Dyfed Powys and Northamptonshire police force areas.

“The joint investigation with Her Majesty’s Revenue and Customs is continuing and a number of suspects will be interviewed in due course.”