Tánaiste Leo Varadkar is restricting his movements after coming into close contact with someone who tested positive for Covid-19.
"Yesterday I was informed that I was a close contact of someone who tested positive for Covid-19. I was swabbed yesterday and the test has come back negative," Mr Varadkar said yesterday in a statement.
"In line with public health advice, I will be restricting my movements to home and outdoor exercise.
"There are no implications for anyone who has been in close contact with me. I am perfectly well and will be working from home."
Mr Varadkar addressed his parliamentary party meeting by teleconference last evening. It is understood his situation does not relate to his recent trade mission to Berlin.
It comes after it was revealed yesterday that Finance Minis- ter Paschal Donohoe is restricting his movements after he learned one of his Eurogroup colleagues tested positive for Covid-19.
French finance minister Bruno Le Maire tested positive for the virus last Friday, seven days after attending a Eurogroup meeting in Berlin with Mr Donohoe.
The meeting, on September 11, was Mr Donohoe's first as president of the Eurogroup.
He had been restricting his movements since returning from Germany as the country was not Ireland's green list at the time of his visit.
However, since learning of Mr Le Maire's positive test, he has been asked to continue restricting his movements until tomorrow.
Mr Donohoe was tested for Covid-19 before he travelled to Berlin and again on his return.
He was also tested last Saturday following news of his French counterpart's positive test. All tests have come back negative.
He has attended all meetings for the past two weeks through video conferencing calls.
In a statement, Mr Le Maire said he had tested positive for coronavirus despite displaying no symptoms.
He said he will remain in isolation and continue his work for seven days.
There were concerns last week that Health Minister Stephen Donnelly had been infected with the coronavirus after he became unwell.
The Dáil was temporarily closed as a precaution and all Cabinet ministers were asked to restrict their movements.
Mr Donnelly subsequently tested negative for the virus and ministers were allowed to resume their work.
He has continued to restrict his movements since falling ill.
Mr Donnelly addressed a Cabinet meeting and Fianna Fáil parliamentary meeting via video from his home this week.
Foreign Affairs Minister Simon Coveney is also restricting his movements after he returned from a trip to Brussels to discuss the ongoing Brexit negotiations.