Arturo Montiel, one of two main contenders for his party's 2006 presidential nomination, dropped out of the race on Thursday in the wake of allegations about large property and bank transactions by him and his family.
At a ceremony with the two remaining candidates, Montiel said he was dropping out of contention to strengthen his Institutional Revolutionary Party, which ruled Mexico from 1929 to 2000.
The decision leaves front-runner Roberto Madrazo and dark-horse candidate Everardo Moreno, still in the race. All potential candidates trail former Mexico City Mayor Andres Manuel Lopez Obrador of the leftist Democratic Revolution Party in the polls, AP reports.
Military expert Vladimir Orlov expressed the opinion that the Pentagon is preparing to strike at least four Russian regions.