The challenge to the results of the July 1 presidential election is being handled "with full transparency," Mexico's TEPJF electoral court said amid more calls from the left for the vote to be annulled.

All of the evidence submitted to the panel is being examined closely, Flavio Galvan Rivera, a member of the committee reviewing the results of the presidential election, said.

The process is open to the public, the magistrate said on a program broadcast by the court.

Members of the public can visit the committee's page on the TEPJF's Web site and view agreements, the work agenda, the filings made by the leftist Progressive Movement coalition challenging the election results and other information, Galvan Rivera said.

Salvador Nava Gomar, another member of the committee, said all the evidence and complaints presented by the coalition were being reviewed.

"They are not going to be able to say that the ruling we issued left something out. There will be transparency and publicity, and there will be, as a result, professionalism, certainty, legal security and a decision that follows the law and the constitution," Nava Gomar said.

Constancio Carrasco Daza, who also sits on the panel, said the hearings with representatives of the Progressive Movement and the Commitment to Mexico coalition, made up of the Institutional Revolutionary Party, or PRI, and the Mexican Green Party, marked an unprecedented step in the challenge process.

"Each of the parties that asks us for a hearing will have every opportunity and the other parties will be notified on our Web page, including the electoral authority, so they will know that we are going to have a meeting with one of the parties," Carrasco Daza said.

PRI candidate Enrique Peña Nieto won the presidential election with 38.21 percent of the vote, while Progressive Movement candidate Andres Manuel Lopez Obrador took second place with 31.59 percent, according to the final official results released by the Federal Electoral Institute, or IFE.

Lopez Obrador said at a rally Sunday in Puebla, a city located about 125 kilometers (77 miles) from Mexico City, that there would be no negotiations with rival candidates because the only acceptable outcome was invalidation of the election results and an order to hold a new vote.

"There is only one agreement, the one that invalidates the presidential election, we are not going to allow any agreement that in any way that gets built over the swamp, over the filth, the main thing is to defend the votes of the citizens," Lopez Obrador told some 4,000 supporters in Puebla.

Lopez Obrador urged supporters to work with the 32 people's assemblies organized across the country to shed light on "electoral fraud."

A summary of the irregularities committed by the PRI will be submitted to the TEPJF electoral court in the middle of this week, Lopez Obrador said.

Lopez Obrador alleges that the PRI and its allies exceeded campaign spending limits and engaged in vote-buying with funds obtained from illicit sources.

"We have solid evidence, so no questions remain, so no legal arguments can be used and the elections declared valid, which are clearly a violation of the constitution," Lopez Obrador said.

The evidence will be presented to the TEPJF so there is no excuse for not invalidating the elections and Congress can name an interim president to serve until new elections are held, the politician, who was the candidate of a coalition of leftist parties led by the Party of the Democratic Revolution, or PRD, said.

"There is evidence that they used front companies to finance everything related to getting out the vote for the PRI," Lopez Obrador said.

"No violence, no provocations," Lopez Obrador told his supporters. "Only those who are in the wrong resort to violence, and we are right."

The leftist politician said recently that he planned to hold an "Expofraude" on Aug. 12 at which evidence of election irregularities would be presented to the public.

Lopez Obrador lost the 2006 presidential election to Felipe Calderon, of the National Action Party, or PAN, by 0.56 percent and has never recognized the results, claiming victory in the contest and declaring himself "president-elect."

The TEPJF is expected to issue a ruling by Sept. 6 on the challenge filed by Lopez Obrador's Progressive Movement coalition, either certifying Peña Nieto the winner or calling for a new vote. EFE