RIO DE JANEIRO — Rio de Janeiro authorities issued an arrest warrant for an International Olympic Committee executive accused of scalping tickets for the Summer Games as part of a wider probe of tickets allocated to Ireland that were being sold for higher fees.

Police said Wednesday that Patrick Hickey is accused of plotting with at least six others to illegally sell tickets for the Olympics. Hickey, 71, is president of the Olympic Council of Ireland as well as president of the European Olympic Committees, and has been been part of the IOC executive board since 2012.

The Olympic Council of Ireland said on its website that it was aware of the reports.

“We are seeking total clarity on the situation before we comment further,” the council said.

“Continuing our investigation, civil police discovered the involvement of Patrick in the international scheme of ticket scalping,” the Rio police fraud unit said.