YEREVAN (Reuters) - The leader of an Armenian protest movement that forced the country’s veteran leader to step down announced on Tuesday a nationwide campaign of civil disobedience after the ruling party thwarted his bid to take over as prime minister.

Armenian opposition leader Nikol Pashinyan attends a rally after his bid to be interim prime minister was blocked by the parliament in Yerevan, Armenia May 1, 2018. REUTERS/Gleb Garanich

Addressing tens of thousands of people gathered in a square in the Armenian capital, Nikol Pashinyan said that starting from 8:15 (12.15 a.m. ET) on Wednesday morning, his supporters would block roads, railways and airports.

The planned day of protest in the small ex-Soviet state sets up a standoff between Pashinyan’s movement, which has mobilised thousands of people to take to the streets, and a ruling elite which is determined to hold on to power and still controls the security apparatus.

“We will block the streets, the airports, the metro, the railway, everything that can be blocked,” Pashinyan told his cheering supporters on Yerevan’s Republic Square.

“If everyone participates in a total act of civil disobedience, this will be a total victory of the people of Armenia. Our struggle is a struggle of non-violence, it is a peaceful act of civil disobedience.”

After days of protests, veteran leader Serzh Sarksyan stepped down as prime minister last week. That seemed to signal a dramatic shift in power in Armenia, an ex-Soviet state closely aligned to Russia that has been run by the same cadre of people since the late 1990s.

Pashinyan, a 42-year-old former journalist who spent two years in jail for fomenting unrest, was submitted to parliament as the only nominee for the vacant prime minister’s job.

But the ruling Republican Party, allied to Sarksyan, has a majority in the legislature and after hours of acrimonious debate it withheld its support for Pashinyan’s candidacy, leaving him short of the support he needed.

Earlier on Tuesday, Pashinyan had warned the ruling elite it could face a “tsunami” of anger from the people if it stymied his move to become prime minister.

Supporters of Pashinyan, who had spent the day in the capital’s Republic Square to watch the parliamentary debate on two huge screens, shouted “shame” when the result of the vote was shown.

“It showed once again that they don’t care about us, about the ordinary people,” said Gurgen, a 61-year-old unemployed man who was among the crowd.

The crisis in Armenia, which has a population of only about three million people and has Russian military bases on its territory, is being closely watched in Moscow.

Officials there are wary of a repeat of a popular revolt in Ukraine in 2014 that swept to power new leaders who pulled away from Moscow’s orbit.

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Protests flared when Sarksyan, an establishment veteran, announced he was seeking to become prime minister. He had previously been president, but was limited by the constitution from seeking another term.

Some Armenians saw Sarksyan’s bid for the prime minister’s job as a cynical ploy to extend his grip on power. Some voters accuse Sarksyan and his associates of cronyism and corruption, an allegation they deny.

Pashinyan has pledged to keep Armenia close to Moscow, saying the changes he wants to make would instead focus on rooting out graft.

During the parliamentary debate, Republican Party lawmakers accused Pashinyan or being an irresponsible rabble-rouser, they alleged he recruited children to join his protest movement, and said he lacked the qualities to command the Armenian armed forces.