As part of the review, submissions will be taken from athletes and their families on their experience of ticketing allocation and availability arrangements for Rio 2016.

It is intended that it will be concluded by October 10 at which point it will be given to Judge Carroll Moran to consider as part of his State inquiry deliberations.

OCI officials Kevin Kilty and Stephen Martin reportedly told Brazilian police yesterday that the organisation's President Patrick Hickey made all decisions regarding ticketing.

Ireland's Chef de Mission for Rio 2016 Kilty and OCI chief executive Martin each went to the Cidade da Policia headquarters alongside their lawyers and were subjected to around four-and-a-half hours of questions.

Each is no longer considered a suspect, police said afterwards, with a process having begun to return their passports and allow them to leave the country.

They are now in a similar position to OCI secretary general Dermot Henihan, who came in for questioning on Tuesday (August 23) but is still waiting to receive his passport.

Hickey, who was also President of the European Olympic Committees and an International Olympic Committee Executive Board member, is being held in the high security Bangu prison in west Rio de Janeiro in connection with the alleged ticketing scam.

He has denied any wrongdoing.

The 71-year-old, who was arrested in a televised dawn raid at the Windsor Marapendi Olympic Family Hotel, has stepped down from all of his sporting roles until the matter is "fully resolved".

Police have supposedly found emails dating back to 2010 between Hickey and Marcus Evans, head of ticketing company THG Sports, discussing Rio 2016 tickets.

THG were the Irish authorised ticket reseller (ATR) for London 2012 and Sochi 2014 but were not selected for Rio 2016, so had no rights to sell tickets.

It is alleged by Brazilian police, however, that Pro10 Sports Management, the Dublin-based company who were selected, were just a front operation to conceal THG's involvement.

In a statement released through their solicitor today, Hickey’s family have said they are "gravely concerned" for his health.

They have also called on Minister for Foreign Affairs Charlie Flanagan and Sports Minister Shane Ross to urgently intervene in addressing the "extremely worrying issues" surrounding his arrest and detention.

"He has a serious heart condition and they are extremely anxious that he would be immediately released on bail and given the opportunity to respond to the accusations," the statement reads.

"It was entirely inappropriate and unacceptable for a 71-year-old Irish citizen be taken from his bedroom, arrested and walked in a state of undress before a pre-arranged camera crew, after which film and still shots were released to the global media."

Flanagan has responded by saying he will meet with the family in the coming days, but that his department "cannot provide legal advice or interfere in any way in the judicial processes in another country".