It's been a turbulent week for the Olympic Council of Ireland after Pat Hickey was arrested in Rio and subsequently stepped down from his position as OCI President.

That - along with the arrest of another Irishman, Kevin Mallon - prompted the Government to set up a non-statutory inquiry to investigate allegations of ticket touting.

A retired judge is expected to be appointed this week to oversee that investigation - which Sports Minister Shane Ross says could take about 12 weeks to complete.

The Tanaiste and Justice Minister, Frances Fitzgerald, says she hopes the inquiry will uncover all the facts behind the case.

The OCI has said it will also appoint an external independent firm to carry out a review into the matter, as its board will meet today.