Two more arrests have been made in a fraud and money laundering probe in Norfolk, which has already seen a serving policewoman arrested.

Two further arrests were made yesterday in relation to an on-going fraud investigation in Norfolk.

Two men were arrested on suspicion of blackmail by detectives from the Eastern Region Specialist Operations Unit.

The first man, in his 30s, was one of three people arrested in Norwich last month for alleged fraud and money laundering offences.

Yesterday afternoon he was further arrested at Wymondham Police Investigation Centre where he was questioned and later released on bail.

A second man, in his 40s, was arrested at an address in Norwich yesterday evening and later also released on bail.

Two women arrested last month in connection with the enquiry remain on police bail pending further enquiries.

Police had confirmed that one of the women arrested was a serving policewoman. They would reveal no other details about her.

The police constable is suspended from duty pending the outcome of the criminal investigation.

A statement from Norfolk police said the officer has been suspended from duty and the matter had been referred - as is routine - to the Independent Police Complaints Commission.

The Eastern Region Special Operations Unit, which has made all the arrests, was established in 2010 specifically to tackle organised crime across East Anglia.

The unit, made up of officers from Norfolk, Bedfordshire, Cambridgeshire, Essex, Hertfordshire and Suffolk, has a stated mission to 'tackle organised crime groups causing the greatest levels of harm to communities of the east', with highly specialised teams whose tactics include undercover policing. Their goal is to 'identify, disrupt and dismantle' organised crime groups.

Operation Fetch is described by the unit as being a RART fraud and money laundering investigation. RART stands for Regional Asset Recovery Team, which carries out financial investigations which can lead to money laundering indictments and confiscations.

• Do you have a crime story? Call crime correspondent Peter Walsh on 01603 772436 or email peter.walsh@archant.co.uk