Board members at Aer Lingus have set up a sub-committee to investigate allegations of sexual harassment against a high-ranking executive in the airline.

It is understood the executive has vigorously denied the allegations. The man's personal lawyers are said to be acting on his behalf.

Two female members of staff are thought to have alleged inappropriate behaviour. One is said to hold a senior position.

The sub-committee will report to the Aer Lingus chairman, Mr Bernie Cahill, when its investigations are complete. It is not known when that process is expected to end.

The Minister for Public Enterprise, Ms O'Rourke, is believed to have been informed of the allegations. There was no comment from Aer Lingus.

These are the first such allegations to be aired publicly about an Aer Lingus executive. The airline has written policies on sexual harassment, bullying and race relations.