Irish Taoiseach Leo Varadkar promised on Friday to resolve a legal "anomaly" that led to the seizure of two small fishing boats from Northern Ireland and drew angry denunciations from some politicians.
A 60-metre armed Irish Coast Guard vessel on Thursday impounded two trawlers registered in Northern Ireland for fishing illegally inside the Republic's six-mile (9.6 km) territorial limit.
The DUP, a close ally of British Prime Minister Theresa May, reacted angrily, with deputy leader Nigel Dodds on Thursday describing the incident as "outrageous... heavy-handed tactics". Mr Dodds also accused the Irish government of using it as a "bargaining chip on Brexit", something the Government denied.
The owners of the trawlers pleaded guilty to breaching fishing regulations at Drogheda District Court on Friday but a judge decided to release them without levying a fine.
An informal bilateral agreement had allowed fishermen from the Republic of Ireland and Northern Ireland to fish inside the six-mile limit of each others' jurisdictions, but it was struck down by the Irish Supreme Court in 2016 and the Republic has yet to approve replacement legislation.
As a result Irish fishermen can legally fish along Northern Ireland's coast but Northern Ireland fishermen are prohibited from fishing along the coast of the Republic of Ireland.
"I think we can have that law changed and that anomaly, if you like, corrected, and we can do that in the next couple of weeks," Leo Varadkar told LMFM Radio, saying legislation had got stuck in the upper house of parliament, which Mr Varadkar's government does not control.
But while the Republic's Minister for Agriculture, Food and the Marine Michael Creed told RTE radio on Friday that the issue had "zero to do with Brexit," Mr Varadkar linked the dispute with Britain's post-Brexit plans for its fisheries and whether or not these it will stay party to the London Fisheries Convention, which governs fishing rights in coastal waters off Western Europe