Caracas - Venezuelan President Nicolas Maduro claimed victory on Monday in an internationally criticized election to pick a new assembly to rewrite the constitution, but the opposition vowed to keep protesting despite deadly clashes.Ten people were killed in a wave of bloodshed that swept Venezuela Sunday as Maduro defied an opposition boycott and international condemnation - including the threat of new US sanctions - to hold elections for a powerful new "Constituent Assembly."Protesters attacked polling stations and barricaded streets around the country, drawing a bloody response from security forces, who opened fire with live ammunition in some cases.Despite the boycott and the unrest, the head of the National Electoral Council, Tibisay Lucena - one of 13 Maduro allies already hit by US sanctions - said there had been "extraordinary turnout" of more than eight million voters, 41.5% of the electorate.In a speech to hundreds of supporters in central Caracas, Maduro hailed it as a win."We have a Constituent Assembly," he said."It is the biggest vote the revolution has ever scored in its 18-year history," he said, referring to the year his late mentor, Hugo Chavez, came to power.The socialist president is gambling his four-year rule on the 545-member assembly, which will be empowered to dissolve the opposition-controlled congress and rewrite the constitution.But the unrest fueled fears that his insistence on convening the assembly -- despite months of demonstrations -- would only plunge the country deeper into chaos.There was blistering international condemnation of the vote, led by Washington."The United States condemns the elections... for the National Constituent Assembly, which is designed to replace the legitimately elected National Assembly and undermine the Venezuelan people's right to self-determination," US State Department spokeswoman Heather Nauert said in a statement.It threatened further "strong and swift" sanctions on Maduro's government.More protests loomThe election was also condemned by the European Union, Canada and Latin American powers including Argentina, Brazil, Colombia and Mexico.The opposition said the vote was a fraud.Senior opposition leader Henrique Capriles called on Venezuelans to continue defying the deeply unpopular Maduro with new protests against the election and the "massacre" he said accompanied it."We do not recognise this fraudulent process," he said, calling for nationwide marches on Monday and a mass protest in Caracas on Wednesday, the day the new assembly is due to be installed.Maduro has decreed a ban on protests during and after the vote, threatening prison terms of up to 10 years.Ten deadProsecutors said 10 people were killed in violence around the vote, bringing the death toll in four months of protests to some 120 people.Those killed included a candidate for the new assembly, a regional opposition leader, two teenage protesters and a soldier in the western state of Tachira, which saw some of the worst violence.In eastern Caracas, seven police were wounded when an improvised explosive targeted their motorcycle convoy.National guard troops used armored vehicles, rubber bullets and tear gas to disperse protesters blocking roads in the capital.Soldiers also violently moved against protesters in the second city of Maracaibo, in the west, and Puerto Ordaz in the east.World protestsMaduro, whose term is meant to end in 2019, describes the election as the most important in Venezuelan history."I have come to vote to tell the gringos and the opposition that we want peace, not war, and that we support Maduro," said voter Ana Contreras.According to polling firm Datanalisis, more than 70% of Venezuelans oppose the idea of the new assembly - and 80% reject Maduro's leadership."The people are not going to give up the streets until this awful government goes," protester Carlos Zambrano, 54, told AFP in western Caracas.Venezuelans also protested in Miami, Madrid and various Latin American cities.The number of Venezuelans living abroad has soared as the once-booming oil producer has descended into a devastating economic crisis marked by shortages, runaway inflation, riots and looting.'A sham'The US envoy to the United Nations, Nikki Haley, condemned the vote as a "sham" - a word also used by Britain's junior foreign minister, Alan Duncan, and many experts."The vote means the end of any trace of democratic rule. Maduro's blatant power grab removes any ambiguity about whether Venezuela is a democracy," said Michael Shifter, head of the Inter-American Dialogue research center.Latin America specialist Phil Gunson, senior analyst at Crisis Group, called the vote "the definitive break with what remains of representative democracy in Venezuela.""It will accelerate the longer-term trend towards economic, social and political collapse unless those in a position to change course do so, and begin to negotiate a restoration of democracy and economic viability," he said.