Mexico is recounting votes cast at more than half its polling places during Sunday’s presidential election, the electoral body said Wednesday, as reports of vote-buying marred the apparent win of the former ruling Institutional Revolutionary Party, or PRI. Ballots from more than 54% of polling places will be recounted within 72 hours, the Federal Electoral Institute (IFE) said. The figure marks a huge increase over the 9% of ballots that were recounted in the long and contentious aftermath of the disputed 2006 election. The recount began early Wednesday as part of the IFE’s normal procedure of validating results gathered from the institute’s 300 electoral districts. By law, ballots are recounted when a polling place shows irregularities, such as more votes cast than there are registered voters, a complete sweep by a single candidate or party, or a 1-percentage-point or smaller margin between first and second place. Separately, the PRI is facing growing accusations that campaigns gave potential voters supermarket debit cards in exchange for their votes, among other allegations.