The National Treasury Management Agency said it sold €1 billion of four and 10-year bonds at a slightly lower interest rate than when they were last auctioned two months ago.
The NTMA auctioned €500m of the 10-year debt at a yield of 0.96% and €500m of the four-year bonds at a yield of 0.020%.
The agency has now raised €11.25 billion of its planned issuance of €14-18 billion of long-term debt this year.
The next auction is a short term Treasury Bill auction which is scheduled for Thursday June 14.
Frank O'Connor, NTMA director of funding and debt management, said that demand in today's auction was strong.
"Total bids amounted to €2.7 billion and were up on previous auction in March despite the lower yields on offer," Mr O'Connor added.