PHOTO GALLERY: Protesters in Mexico pour anger at National Palace

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A person in a disguise sits on a sidewalk holding a candle during a protest denouncing the apparent massacre of 43 trainee teachers in Mexico City late November 8, 2014 (Photo: Reuters)

Protesters carry a sign during a march denouncing the apparent massacre of 43 trainee teachers in Mexico City late November 8, 2014 (Photo: Reuters)

A group of protesters set fire to the wooden door of Mexican President Enrique Pena Nieto's ceremonial palace, during a protest denouncing the apparent massacre of 43 trainee teachers, in the historic center of Mexico City late November 8, 2014 (Photo: Reuters)

A group of protesters set fire to the wooden door of Mexican President Enrique Pena Nieto's ceremonial palace during a protest denouncing the apparent massacre of 43 trainee teachers, in the historic center of Mexico City late November 8, 2014 (Photo: Reuters)

Protesters stand amidst tear gas outside Mexican President Enrique Pena Nieto's ceremonial palace in the historic center of Mexico City late November 8, 2014 (Photo: Reuters)

Firefighters extinguish fire on a car after a protest in support of the missing students of Ayotzinapa Teacher Training College Raul Isidro Burgos outside the government palace of Guerrero state in Chilpacingo November 8, 2014 (Photo: Reuters)

People yell slogans outside the ceremonial palace of Mexican President Enrique Pena Nieto denouncing the apparent massacre of 43 trainee teachers in Mexico City late November 8, 2014 (Photo: Reuters)

Protesters gather near the Hemicycle of Juarez during a march denouncing the apparent massacre of the students in Mexico City late November 8, 2014 (Photo: Reuters)

People lie in a circle pretending to be dead near the ceremonial palace of Mexican President Enrique Pena Nieto during a protest denouncing the apparent massacre of 43 trainee teachers in Mexico City late November 8, 2014 (Photo: Reuters)

Thousands of people marched in the capital in the latest demonstration over a case that has repulsed the nation and triggered the biggest crisis of President Enrique Pena Nieto's administration.

The violent protests came a day after authorities said suspected gang hitmen confessed to killing the 43 students and incinerating their bodies in the southern state of Guerrero.