Agriculture Minister Charlie McConalogue has tested positive for COVID-19.
In line with public health advice, all ministers are now restricting their movements while awaiting a COVID-19 test and result.
A spokesperson for Minister McConalogue confirmed the minister had tested positive, but is displaying no symptoms of the virus.
The Agriculture Minister is now self-isolating.
The news comes a day after yesterday's Cabinet meeting at Dublin Castle, during which ministers approved new coronavirus restrictions.
Meanwhile, the Government has urged people to reconsider their plans for Christmas.
Senior Government official Liz Canavan said people planning to visit elderly relatives need to think twice.
She said people really need to look at where they've been recently, as well as how many people they and their household members have come in contact with.