Mexico City, September 27 (RHC/Agencies) -- President Enrique Peña Nieto said Monday that Mexico will continue to investigate the case of the 43 students who went missing in the southern state of Guerrero two years ago.

At a news conference in Cartagena de Indias, Colombia, where he attended the signing ceremony of a historic peace deal between the Colombian government and the Revolutionary Armed Forces of Colombia (FARC), Peña Nieto said his government's "only interest" is finding out what happened on the evening of September 26 and in the early hours of September 27, 2014, in the municipality of Iguala, Guerrero.

On Monday, students from all across Mexico, mainly in the capital, and the southern states of Guerrero and Oaxaca, held marches demanding the government to clarify the facts.

During an interview with Aristegui Noticias, Vidulfo Rosales, lawyer for the students' parents and Felipe de la Cruz, spokesperson for the parents, condemned the fact that two years after the disappearance, the students' whereabouts are still unknown and so far no one has been sentenced, despite 180 people being arrested.