Mexico goes to the polls - in pictures

Mexico City: Mexicans queue early in the morning to cast their votes Photograph: Cris Bouroncle/AFP/Getty Images

Ajijic, Jalisco: People queue at a polling station Photograph: Hector Guerrero/AFP/Getty Images

Mexico City: The police have been deployed to give security to polling centres during the election
Photograph: Yuri Cortez/AFP/Getty Images

Ajijic, Jalisco: People prepare to cast their vote Photograph: Hector Guerrero/AFP/Getty Images

Mexico City: Women carry materials to be used during the presidential election Photograph: Yuri Cortez/AFP/Getty Images

Mexico City: Workers prepare a polling station Photograph: Cris Bouroncle/AFP/Getty Images

Mexico City: A man assembles boxes at a polling station Photograph: Claudia Daut/Reuters

San Bartolome Quialana: A woman prepares a polling station Photograph: Reuters

Mexico City: A voter reads about continued drug-related violence while waiting in line for polls to open Photograph: John Moore/Getty Images

Ajijic, Jalisco: Women cast their votes at a polling station Photograph: Hector Guerrero/AFP/Getty Images

Atlacomulco: People place their votes in ballot boxes Photograph: Mario Vazquez/AFP/Getty Images

Leona Vicario, Cancun: A woman casts her vote at a polling station Photograph: Reuters

Mexico City: A poll supervisor instructs voters to go to a different voting station as the polls opened. Published instructions by the Federal Election Institute (IFE) had given false information to some voters on polling locales Photograph: John Moore/Getty Images

San Bartolome Quialana, Oaxaca: A woman casts her vote at a polling station Photograph: Reuters

Oaxaca: Electoral workers prepare ballots at a polling station Photograph: Luis Alberto Cruz/AP

Santiago Xalitzintla, Puebla: A police officer stands guard outside a polling station Photograph: Marco Ugarte/AP

San Lorenzo Tlacoyucan, Mexico City: A woman casts her vote at polling station in a school Photograph: Omar Torres/AFP/Getty Images

Huisquilucan de Degollado: The Mexican presidential candidate for the National Action Party (PAN), Josefina Vázquez Mota, is surrounded by the press after casting her vote Photograph: Johan Ordonez/AFP/Getty Images

Mexico City: Andres Manuel Lopez Obrador, presidential candidate for the Party of the Democratic Revolution (PRD), shows his inked thumb after voting Photograph: Reuters

Enrique Peña Nieto comes out of the polling booth in Atlacomulco Photograph: Tomas Bravo/Reuters