President Rafael Correa declared victory after an exit poll and partial unofficial results indicated voters approved all 10 ballot questions in a referendum Saturday, an outcome critics say will tighten his grip on power, inhibit press freedom and lessen the judiciary's independence.

The exit poll by SP Investigacion y Estudios, which regularly does work for the government, said voters approved all the questions by greater than 60 percent. Partial unofficial results compiled for the state Electoral Council and representing 12 percent of voting stations, meanwhile, showed all the questions winning with about 53 percent support.

Official results trickled in slowly with less than 6 percent of the vote five hours after polls closed while Correa and 3,000 supporters celebrated in the streets.

The chief of an Organization of American States observer team, Enrique Correa of Chile, said voting appeared to go smoothly and there was no evidence of fraud.

The plebiscite was an important gauge of a leftist U.S.-trained economist who has brought unusual stability to a small, traditionally volatile South American nation.

Correa noted in a TV interview that it was the eighth straight electoral victory "of this dream that is called citizen's revolution." The first was his 2006 election, and he was easily re-elected in 2009 after a rewrite of the constitution, following a playbook written by his ally, President Hugo Chavez of Venezuela.

"The Ecuadorean people have triumphed. Democracy has triumphed" with the referendum, said Correa, who can stand for re-election in two years.

Some questions were straightforward, such as whether to ban bullfighting and gambling. Others were complex, their questions and their multiple-page annexes vexing even to some attorneys.

Two of the most controversial would bar owners of news media from having other commercial interests and create a government media oversight panel.

Correa called approval of the media ownership question "a historic deed."

"We are going to diffuse the power in this country," he said.

Critics say the referendum instead consolidated power in favor of Correa.

Former President Lucio Gutierrez, a fierce Correa opponent, said that with the referendum Correa "seeks to take justice by force and dominate the news media."

Correa proposed the referendum in January, three months after surviving a seemingly spontaneous violent police revolt over benefit cuts that he called a coup attempt.

Much like Chavez, he has faced a largely hostile press. He has since February filed defamation charges against five journalists, seeking million-dollar fines and jail terms for some.

The international watchdogs Human Rights Watch and the Committe to Protect Journalists have criticized Correa's behavior as autocratic.

One key ballot question Saturday called for dissolving Ecuador's judicial oversight council and replacing it with a temporary body given the task of reworking the system. Another would allow authorities to detain suspected criminals longer without filing charges.

Results of the exit poll were broadcast immediately after polls closed, and Vice President Lenin Moreno told reporters that the government took the victory with "humility" but added that lawmakers now have a mandate to convert the vote's results into law.

Five of the questions mandate constitutional change. The other five require congressional action.

Firmly in South America's leftist bloc, Correa enjoys a 65 percent approval rating in a country that in the decade prior to his election saw three presidents, most recently Gutierrez, ousted in popular revolts.

Often haughty and uncompromising, Correa has alienated many former allies, including leaders of Ecuador's indigenous movement. They are angry with his insistence that the state have the last word on subsoil and water rights.

But Correa's populist programs, such as $35 monthly payments to nearly 2 million poor families, construction of low-income housing and a commitment to universal free education, have boosted his popularity in this small Andean nation of 14.3 million people.

Political analyst Adrian Bonilla of the FLACSO think tank says that with strong leadership, Correa has ably leveraged Ecuador's oil wealth and an effective tax system into popular programs.

He has drawn criticism for alleged autocratic tendencies, however.

Former President Osvaldo Hurtado, whose Christian Democrats like all Ecuador's traditional political parties have all but disappeared, said Correa has conjured "a perfect dictatorship" by manipulating democratic institutions just as Chavez in Venezuela.

Correa has alienated many foreign investors by renegotiating oil contracts to give Ecuador a higher cut of profits and has forged new business ties with China and Iran.

Last month, he expelled U.S. Ambassador Heather Hodges after the WikiLeaks website disclosed a diplomatic cable from her suggesting Correa was well aware but tolerant of high-level corruption in Ecuador's national police.

Many voters had trouble understanding the ballot questions and some said they voted "no" as a result.

"The truth is I don't understand a lot of the questions," said Nataly Mendez, a 24-year-old pharmaceutical representative voting in Quito's lower-middle-class Don Bosco neighborhood. "That's why I voted no."

Many who voted "yes" said it was out of esteem for the government.

"We Ecuadoreans should be committed and help out if we want things to change," said Maria Lourdes Silva, a 43-year-old cosmetics saleswoman.

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Associated Press writers Gabriela Molina in Quito and Frank Bajak in Lima, Peru, contributed to this report.

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Gonzalo Solano on Twitter: http://twitter.com/GESolano

Frank Bajak on Twitter: http://twitter.com/fbajak