The Chief Medical Officer claims firms chartering planes to fly workers into Ireland goes against public health advice.
Keelings Fruit in Dublin has been criticised after it flew nearly 200 workers from Bulgaria to pick strawberries.
Dr Tony Holohan, who did not know about the flight until after it happened, says strict rules on who can travel here are in place.
"We don't want to see any other form of travel coming through the ports or the airports other than those sorts of categories and that has been our clear recommendation.
"Anybody who is coming through the airport that is in the categories that we identified, we see the public health advice that we have given as applying to those individuals."
The Taoiseach has now ordered a review into how the current travel restrictions are being followed at ports and airports.
Health Minister Simon Harris says he feels uneasy about the incident.
"I know that the company said that they were quarantining and following public health advice for 14 days but I don't feel comfortable with it.
"I know the Taoiseach and I are both looking into this for more information.
"It just doesn't seem right to me or to him."
Fianna Fáil is calling for the government to stop giving work permits to some international citizens during the pandemic.
Business spokesman, Robert Troy, says the Business Minister must take radical action.
"Work permits were issued at a time when we were practically at full employment and when critical sections of the economy couldn't get employees to work in these sectors," he said.
"We, unfortunately, don't have full employment now and I would ask that Minister Humphreys review the work permit scheme within her department."