A swimming coach has been arrested as part of an investigation into the alleged sexual exploitation of children in the sport.

The man was questioned on Tuesday at a Garda Station before being released without charge.

A file on the case is to be sent to the Director of Public Prosecutions.

This investigation is being led by a Garda Divisional Protective Services Bureau comprised of detectives specially trained to investigate sexual offences.

It began after a number of people became concerned that a recording device or devices may have been hidden in an area where children changed before and after swimming sessions.

Swim Ireland was alerted and the association reported the matter to gardaí.

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A number of children and their parents were interviewed and evidence was gathered before the suspect was arrested last Tuesday on suspicion of committing an offence under the Criminal Law Sexual Offences Act.

The man was questioned throughout the day before being released without charge.

Gardaí are due to send a file to the Director of Public Prosecutions who will decide whether the coach is to face criminal charges.

The alleged offences can carry a sentence of up to ten years in prison.

In a statement to RTÉ News, Swim Ireland said the matter was raised with its National Children's Officer earlier this year, who in line with its procedures, contacted the statutory authorities straight away.

"The matter is now being investigated by the gardaí. All relevant protocols are active including dissemination of information as appropriate.

"Our priority is to offer appropriate support and to co-operate with the Garda investigation. As we understand it, this is not a matter that has previously been raised with the gardaí and our National Children's Officer continues to liaise closely with them."