I reported a couple of days ago about a Mexican presidential candidate having paid journalists for mentions on radio outlets.
The radio station named as receiving money, Grupo Fórmula, has since explained that these payments - made by Enrique Peña Nieto - involved sponsorship and/or adverts.
The station was supported by the National Chamber of the Radio and Television Industry, which represents the owners of Mexico's radio and television companies.
It sent a letter to the director of the Reforma newspaper, which broke the story of the payments, saying the sponsorship ads were clearly identifiable to the audience and were commercially transparent.
But the row continues. One receipt showed that radio journalist Carolina Faure had charged £900 for supporting "information and interviews" on her radio show.
And Joaquín López Dóriga, the TV news anchor with the largest audience in Mexico, was paid £425,000 for radio comments.
According to opinion polls, Peña Nieto is expected to win the Mexican presidential election on 1 July.
Source: Knight Centre
