Dublin Airport on Saturday said it was reopening Terminal 2 after a brief closure due to a security alert.
Terminal Two was previously evacuated due to a potential security threat.
"Dublin Airport confirms Terminal 2 has received the all-clear. Passengers will shortly re-enter & flights are expected to resume within 30 mins," the airport said in a statement on X.
Police said in a statement that they had attended an incident at the airport, but gave no further details.
The military's bomb squad and the anti-terrorist Special Detective Unit were at the scene of the incident.
Dublin experiences Europe-wide software issue
The airport said it was also experiencing minor impacts related to a Europe-wide software issue.