A Qatari whistleblower who was jailed after raising concerns about the mistreatment of migrant workers at World Cup stadium sites was tortured on the eve of the tournament, his family has claimed.

The human rights organisation FairSquare also released a letter from the family of Abdullah Ibhais, a former media manager in Qatar’s Supreme Committee, who accused Fifa of “callous indifference” for ignoring his case.

FairSquare is now calling for the United Nations working group on arbitrary detention to intervene in the hope that Ibhais will be released from his three-year jail sentence...