Mexican President Felipe Calderon's party conceded defeat in Sunday's mid-term parliamentary elections, which was won by the opposition Institutional Revolutionary Party (PRI).

The head of the ruling National Action Party (PAN), German Martinez, told reporters that with the victory, PRI, would be a leading force in the lower chamber.

Early returns showed that with about 45 percent of the ballots counted, the PRI gained about 35 percent of votes for the lower house of Congress, while the PAN mustered some 27 percent.

In a televised speech, Calderon acknowledged the results and urged the country to unite for a quick economic recovery.

Source: Xinhua