The chief medical officers on both sides of the border will meet by video link tomorrow to discuss drawing up a co-ordinated approach to reduce travel between Northern Ireland and Co Donegal.
Taoiseach Micheál Martin tonight spoke separately about the issue to Stormont's First Minister Arlene Foster and Deputy First Minister Michelle O'Neill.
They agreed on the need for "a pragmatic and practical" policy aimed at reducing travel between the jurisdictions except for work, education or exempted reasons.
There is particular concern about travel between Donegal and the area around Derry.
While Donegal currently has the highest rate of infection per 100,000 of population south of the border, Derry and Strabane are the worst areas of Northern Ireland.
Acting Chief Medical Officer Dr Ronan Glynn and Northern Ireland’s Chief Medical Officer Dr Michael McBride will speak about the issue tomorrow morning.
189 new cases of coronavirus were reported in Northern Ireland today, taking the total to 9,950.
There were no further deaths so the official Department of Health toll remains at 577. There are 41 Covid-19 patients in hospital, with 5 in ICU.
The rate of infection per 100,000 of population in Derry and Strabane over the past 7 days was 141.4 - the highest rate anywhere on the island of Ireland.