Mexican president Enrique Peña Nieto was in Chihuahua, Mexico preparing for an official visit to the United States to attend the Sun Valley Conference in Idaho, and he was asked by reporters about his country's relationship with the United States.

The president said that so far there's nothing that affects the bond between the two nations. He was asked later for his views on a media report that the U.S. National Security Agency had spied on countries including Mexico.

"We have asked quite clearly, via the foreign ministry ... for an explanation from the government ... about possible spying," he told reporters.

"And we want to know if this is the case, and if it so, it would obviously be totally unacceptable," the president added.

Mexican newspaper El Universal insisted on what would happen between Barack Obama and Peña Nieto if he found out the allegations were in fact, true.

"Right now there's nothing altering the respect and cordiality that we have established with the American government, and we are setting new goals to work towards a stronger relationship that generates benefits and development."

Claims that the NSA monitored internet traffic, especially in Colombia, Venezuela, Brazil and Mexico, were made in a Brazilian newspaper citing documents leaked by Edward Snowden.

RELATED: Edward Snowden Comes Forward Via The Guardian For NSA Leaks

Also, the Mexican government responded to a media report alleging that the prior administration had signed a contract in 2007 allowing the United States to install a system to monitor phone and internet communications in Mexico.

However, it is known that former president Felipe Calderón worked closely with the US on security to fight a war against Mexico's drug cartels.