A note found on an Aer Lingus plane which claimed a bomb was on board has been declared a hoax by gardai.

Aer Lingus Flight EI631 from Brussels was given priority to land at Dublin Airport this morning after flight crew reported a note had been found in the toilet claiming a bomb was on board.

The aircraft was taken to a dedicated zone while gardai interviewed passengers and searched the plane - nothing suspcious was found and the incident has been declared a hoax.

Aer Lingus says all passengers have now disembarked.

It's one of three security alerts to have taken place at Dublin Aiport overnight.

At about 10pm last night, a Yellow Alert was issued for a bomb threat in one of the terminals.

Separately, there was a partial evacuation of one of the piers at Terminal One this morning when a fire alarm went off.

All incidents have now been resolved and an investigation is underway.