Juan Angel Napout has resigned as president of CONMEBOL, the South American football governing body has announced.
Napout, from Paraguay, was arrested last week in Zurich as part of the ongoing investigation into alleged corruption within world governing body FIFA. He was given a provisional 90-day ban by FIFA's ethics committee.
A CONMEBOL statement on Friday night (Saturday morning GMT) read: "With the resignation of Mr Juan Angel Napout as president, the congress was convened for the election of officers [president and vice-presidents] for the 26th of January 2016.
"The acting [presidency] of CONMEBOL shall be exercised by Wilmar Valdez until the date of the aforementioned congress.