Mexico's old ruling party, the PRI, is set to return to power as early official results indicate its candidate Enrique Pena Nieto has won the presidential election.

官方数据显示，墨西哥前执政党，革命体制党将再度执政，因起候选人潘尼亚·尼托赢得了总统竞选。

Mr Pena Nieto, 45, is on some 38%, several points ahead of Andres Manuel Lopez Obrador, who has not conceded（承认，退让） .

Thousands of police were on duty for the vote, amid fears of intimidation¹（恐吓，威胁） from drug gangs.

Mexicans were also electing a new congress and some state governors.

'New face'

Celebrations at the headquarters of the PRI (Institutional Revolutionary Party) started after the polls closed.

Mr Pena Nieto declared: "We all won in this election. Mexico won."

"This is just the start of the work we have before us."

He thanked Mexican voters for giving the PRI a second chance, saying his administration would have a "new way of governing".

The election campaign was dominated by the economy and the war on drugs.

"There will be no pact² nor truce³ with organised crime," Mr Pena Nieto said.

He had been presented as the new face of the PRI, a break with the party's long and at times murky⁴ past that included links with drug gangs.

The party held on to power for 71 years until it was defeated in 2000.