More than €2m worth of cocaine, cannabis and heroin has been seized - along with at least €500,000 in cash - from alleged organised crime gangs in Dublin.

Gardaí said the operation, which took place over the last two days, targeted international drug trafficking networks.

They believe one of the seven men arrested following these operations is linked to the Kinahan organised crime group. The men range in age from their 20s to their 40s.

Three of those in custody were held after they tried to get away by swimming in the River Liffey.

A garda swam after them and two were detained yesterday, while the third was arrested today.

Gardaí who searched a residential property in Beaumont, Dublin 9 yesterday and seized cocaine with an estimated street value of €150,000 have this evening charged one man in relation to this seizure.

They seized bottles of wine and Champagne, some of which had been infused with cocaine. It is the first time this method of concealment has been discovered in Ireland.

The accused, aged in his 20s, is due to appear before the Criminal Courts of Justice tomorrow morning.

He had earlier been arrested at the scene on suspicion of drug trafficking and was being questioned at Ballymun Garda station.

In another operation undertaken yesterday, personnel attached to the Garda National Drugs & Organised Crime Bureau, supported by a Special Crime Task Force, intercepted a vehicle travelling on the M50 motorway.

The investigation team also searched premises located in Palmerstown, Dublin 20 and the Dublin 2 area.

In the course of these searches, the investigation team located and seized substances believed to include cannabis, cocaine and heroin, which are now subject of forensic examination.

At this time, it is the estimated street sale value of the drugs seized, is in excess of €2 million. A substantial quantity of cash was also located and seized.

Other items - including equipment used for the purpose of money counting - were also located and seized.

Five men are being questioned in relation to the second operation and remain in Garda custody while a sixth man has been charged and is due to appear before the courts tomorrow.

Investigations remain ongoing.

Assistant Commissioner John O'Driscoll was assigned responsibility for heading Garda Síochána initiatives designed to tackle organised and serious crime.

He stated: "The outcome of operational activity undertaken by the Garda National Drugs and Organised Crime Bureau, supported by a number of other specialised units within the Garda Síochána, over the past 24 hours, is very significant.

"It reflects exceptional policing skills along with dedication and bravery on the part of the personnel involved.

"Large quantities of drugs have been seized, along with a significant quantity of money suspected to be proceeds of drug trafficking.

"Persons believed to operate at a significant level within the world of organised crime have been identified and arrested.

"A drug trafficking route has been identified and disrupted and a new method of concealing controlled substances has been identified and exposed."