MEXICO CITY (AP) — Opposition parties vowed Friday to challenge the results of two hotly contested governorship elections in Mexico after final vote counts showed wins for the ruling Institutional Revolutionary Party. An opposition coalition won in a third race.

The leader of the leftist Morena party said Friday his group would file appeals seeking to overturn the results from at least five districts in the State of Mexico where he claimed there was fraud.

Morena leader Andres Manuel Lopez Obrador said he didn't want to overturn all the results of last Sunday's governorship elections, nor does he want a new vote. He said that if the five allegedly invalid districts were thrown out, Morena candidate Delfina Gomez would have won.

"These are the most outlying regions, where there is the most poverty, the most violence," Lopez Obrador said. "There, the majority of votes were bought."

Unlike the 2006 presidential elections, in which Lopez Obrador led street protests against alleged fraud, his party did not announce any demonstrations in the State of Mexico.

The State of Mexico is the country's most populous state, and surrounds Mexico City. State electoral authorities said Thursday that final vote counts showed the PRI's candidate had won by about 2.8 percent.

Also Friday, the conservative National Action Party vowed to challenge final vote counts showing the PRI held on to the governorship of the scandal-wracked northern border state of Coahuila.

The state's electoral authorities had provided very incomplete preliminary vote counts, leading to accusations of fraud.

A more final vote tally showed the PRI candidate had won by 2.4 percent, but opposition candidates say there were irregularities in the handling of ballot boxes.

National Action Party leader Guillermo Anaya said his party would challenge the results in electoral courts.

"I am going to continue fighting until justice is done," Anaya told local media.

In both cases, the opposition forces failed to run alliance candidates, splitting the opposition vote and allowing the PRI to win with only about one-third of the votes.