Six children were taken to hospital today as a precautionary measure following an incident at a swimming pool at NUI Maynooth.

Nineteen others were assessed at the site in Co Kildare and returned to school or directly to their families.

Initial reports had indicated all 25 of the under nines on a school visit to the swimming pool had been taken to hospital, following a suspected leak of vapours into an air conditioning system during routine maintenance.

An investigation into the incident is being carried out by the Health and Safety Authority.