Brazilian police are also reported to be seeking the passports of Football Association of Ireland chief executive and OCI vice-president John Delaney; acting OCI president Willie O’Brien and OCI official Linda O’Reilly.
RTÉ says there is nothing to suggest impropriety on the part of any of those officials.
Three senior Olympic Council of Ireland officials, including one from Northern Ireland, have had their passports, phones and laptops seized in Brazil.
It is part of the investigation into alleged illegal ticket sales.
RTÉ and the Irish Times say the officials include OCI chief executive Stephen Martin – an Olympic gold medal winner – from Bangor, County Down.
The OCI has appointed a crisis management committee to lead its response to Brazil.
Mr Martin, a former hockey player, was previously a director of coaching at Ulster Hockey.
The two other executives are reported to be OCI Secretary General Dermot Henihan and Kevin Kilty, Ireland’s Olympic chef de mission.
