Mexican leftist presidential candidate Andres Manuel Lopez Obrador has warned the country's stability is at stake over its bitterly contested presidential election.
Lopez Obrador made his remarks Wednesday as Mexico's Federal Electoral Institute began reviewing the totals from polling stations to determine whether he or his rival Felipe Calderon won the tight race.
Initial results from Sunday's balloting show conservative Calderon, from the ruling National Action Party, ahead by one percentage point over Lopez Obrador, who represents the Democratic Revolution Party. Both candidates have declared victory in the closely fought election.
The controversy has prompted concerns of a return to Mexico's fraudulent electoral past, despite assurances by most international observers the election was properly conducted.
The Federal Electoral Institute has to rule on electoral disputes by August 31 and declare a winner by September 6.