Complaints rise on vote-buying in Mexico elections

The complaint by National Action Party candidate Josefina Vazquez Mota nonetheless added weight to growing accusations that the apparent winner of Sunday's elections, Enrique Pena Nieto of the long-ruling Institutional Revolutionary Party, benefited from vote-buying schemes.

The accusations are expected to become the basis of legal challenges to the final vote count, which was being completed by electoral authorities Thursday.

The Federal Electoral Institute found that Pena Nieto still had a more than 6 percentage point lead after a nearly 100 percent count, which included an extra review of more than half the ballot boxes in response to indications of possible problems. The count must be certified in September by Mexico's Federal Electoral Tribunal, which has declined to overturn previously contested elections, including the 2006 presidential vote that was far closer than Sunday's.