European football chiefs have urged the head of Fifa, Sepp Blatter, not to run for re-election as president.
The Uefa executive is instead urging the 78-year-old to leave office next year.
Uefa executive member Michael van Praag said Fifa had become linked to "corruption and bribery and all kinds of old boy's network", the Associated Press reports.
It follows recent allegations about corruption in Qatar's successful bid for the 2022 World Cup.
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Political parties across the country suspended their General Election campaigns following the Manchester Arena terror attack on Monday.
Investigators believe Mr Kushner has significant information relevant to their inquiry, officials told NBC News.
The men were detained as part of an investigation by MI5 and the Metropolitan Police's Counter Terrorism Command.