Mexico's upcoming mid-term elections may see a record low turnout, with just 33 percent of the nation's registered voters expected to cast ballots, the Federal Election Istitute (IFE) said Thursday.

The July 5 election will likely to see 25 million voters out of a total of 77 million, said IFE president Leonardo Valdes Zurita.

Analysts said the election has drawn little attention because parties have focused on the IFE's role as an adjudicator, rather than on issues that affect the public.

Also, there has been a growing campaign calling for citizens to annul their votes to protest the state of politics in Mexico.

"The IFE respects the decision of those who want to annul their vote," Valdes said. "The campaign is promoting participation, but in an unusual form."

Mexico's ballots have included two extra options -- a write-in candidate and a null vote -- since the 1940s, he said.

The election will decide all 500 seats in the Chamber of Deputies, the lower house of Congress, six governorships, and hundreds of state and city offices.

Source: Xinhua