Update 12.40pm: A man has been arrested in Malaga in connection with the murder of Gary Hutch in Spain last year.
€23,000 in cash was seized, along with counterfeit documents relating to money laundering.
Gardaí, assisted by Spanish police, also launched a series of raids in six areas of Dublin this morning.
The Tánaiste has praised the Gardaí for their relentless pursuit of gangland criminals.
“I am determined that Irish criminals will not escape justice by fleeing the jurisdiction, or by seeking to conduct their noxious activities from elsewhere,” she said.
“There will be no let-up in the pressure we are bringing to bear on these people.”
Briefing the media this afternoon, Detective Superintendent Tony Howard said: "This morning a number of Gardaí were present with members of La Guardia Civil in Malaga in Spain.
"They carried out a number of searches in Spain and one person has been arrested in relation to the homocide of Gary Hutch in Spain in 2015."
Earlier: A number of raids were carried out this morning across Dublin city and country to gather evidence against individuals engaged in serious organised crime.
It has been reported the raids are targeting the Kinahan gang.
Gardaí from the Garda National Drugs and Organised Crime Bureau, along with staff from the Criminal Assets Bureau carried out the seaches.
The raids began at 6.30am this morning and are currently ongoing.
They are searching various properties in Tallaght, Clondalkin, Crumlin, and other parts of Dublin.
The operation is the culmination of significant investigative activity to date and is supported and assisted by the Spanish police La Guardia Civil.
The presence of Spanish Police Officers in Dublin is key –they've been helping Gardaí investigating the Kinahan Hutch feud for a number of months.
The Kinahans are based in the Costa del Sol – where at least two murders linked to the feud have taken place.
This morning’s searches are in a bid to gather evidence that would enable them to prosecute those involved in, organised crime.
It’s understood raids are taking place in Spain in tandem with this operation this morning.