Four questioned over a series of armed raids on cash transit vans in Dublin this year were released last night and files are being sent to the Director of Public Prosecutions.
They were part of a group of eight people arrested yesterday and on Thursday following co-ordinated raids by gardai on Friday.
Of the eight two women and one man were released in Friday and files have been sent to the DPP. Another man has been remanded in custody after appearing in Dublin District Court yesterday charged with robbery.
Police are investigating a number of armed raids in which over €1 million has been stolen. There have been more armed robberies in the first six months of this year than in 2003 and 2002 combined.
Responding to the increased number of raids gardai initiated Operation Delivery in June to target a well-known Dublin gang believed to be involved in the robberies.
This operation is led by Chief Supt Martin Donnellan of the National Bureau of Criminal Investigation.