An Garda Síochána and PSNI have said they are committed to effective cross-border policing to tackle crime like burglary and dangerous driving in both jurisdictions.
Garda Commissioner Drew Harris and PSNI Chief Constable Jon Boutcher attended a conference in Co Cavan where they launched a new three-year strategy to tackle cross-border policing challenges.
Mr Harris said organised crime remained a focus but police were also focused on what he called "volume crime" which affected communities.
He cited roads policing and burglary in particular.
Mr Harris said effective information sharing and communication were the keys to disrupting the activities of those responsible.
"These are normal policing activities and things that we want to prevent and detect, and therefore, then what we want to be sure of is that we're sharing information, we communicate.
"But also then operationally, we act together, and in fact, then that's a force multiplier in terms of our impact on both sides of the border."
The day-to-day policing is on top of efforts by the Cross Border Joint Agency Taskforce established to tackle major criminal networks.
In July, gardaí seized 12 handguns and six rifles in Ardee, Co Louth in an operation targeting an organised crime gang.
Information passed to the PSNI allowed it to seize component parts for firearms in Northern Ireland.
In October, a joint operation involving An Garda Síochána, the PSNI and Revenue and Customs in Rosslare Port led to the seizure of cocaine worth €2.1m.
Mr Harris was also asked about the decision to release images of people of interest linked to last year's Dublin riots.
He said gardaí had done their own data protection impact assessment and had exhausted attempts internally to identify those whose images had been published.
Mr Harris said the approach had been proportionate to the seriousness of the disorder and had added 90 people to the 54 persons of interest already identified.
The main investigative effort to date had been focused on those physically involved in disorder, he said.
Mr Harris said officers were aware that others had used social media to whip up anti-immigrant sentiment but that many of those had been from outside the jurisdiction.
When asked about the ongoing investigation into missing Dundalk eight-year-old Kyran Durnin, Mr Harris said a huge amount of information had been received from the public.
Detectives were working through that at the moment and investigative actions would follow, he said.
