2 July 2012
Last updated at 15:44
Enrique Pena Nieto, the telegenic candidate of the Institutional Revolutionary Party (PRI), looks set for victory in Mexico's presidential polls, according to early results. As the first figures came in, Mr Nieto celebrated to chants of "Presidente, Presidente".
The results mark a comeback of the PRI, which governed Mexico for seven consecutive decades until it was voted out in 2000.
Supporters of Andres Manuel Lopez Obrador, of the Party of the Democratic Revolution (PRD), who was Mr Nieto's nearest rival. Mr Obrador - who alleged fraud after losing narrowly in 2006 - has not conceded defeat.
The ruling National Action Party's Josefina Vazquez Mota trailed in third place. Support for President Felipe Calderon has been eroded in recent years by high levels of drug violence.
Nearly 80 million Mexican citizens were eligible to cast ballots in Sunday's polls. Officials said the voting was largely peaceful, but reported some initial problems as a number of stations opened later than planned.
Police and army were deployed to protect voters from intimidation by drug cartels at polling booths. This police officer was guarding a polling station in Santiago Xalitzintla, Puebla state.
Mexicans were also voting for new members of Congress. Some state and local elections were also held.
With nearly half of the Mexican population living in poverty, the economy was one of the main issues in the campaign. While unemployment is low, there is a considerable gap between rich and poor.