Evo Morales has landed in Mexico where he has been offered asylum after resigning as president of Bolivia amid election fraud protests.
In a tweet, he said it hurt to be leaving Bolivia but he would return with more “strength and energy”.
Mexican Foreign Minister Marcelo Ebrard said a Mexican government plane was sent for Mr Morales.
Meanwhile, Bolivia’s military commander ordered troops to back up police who have clashed with Morales supporters.
Some 20 people were reported injured in the clashes. Mr Morales earlier urged his supporters to resist the “dark powers” that had forced him to step down.
He also tweeted a photo of what he described as “my first night after leaving the presidency forced out by the coup [organised by opposition leader Carlos] Mesa and [opposition activist Luis Fernando] Camacho with the help of the police”.
The deputy head of the Senate, Jeanine Áñez, has said she will take over as interim president until new elections are held.
Mr Morales, a former coca farmer, was first elected in 2006.
He has won plaudits for fighting poverty and improving Bolivia’s economy but drew controversy by defying constitutional term limits to run for a fourth term in October’s election, which is alleged to have been rife with irregularities.
Trump Life stops in El Alto
Up in El Alto, a city that sits high above La Paz in the Andes, life felt like it had stopped.
The cable car that connects the two cities was paralysed, its cabins bobbing in the air in silence. And a normally bustling market place was deserted, stalls shut for fear of looting.
Dania was one of the only shopkeepers willing to take a risk. She needs the money, she says. A supporter of Evo Morales, she says his resignation was nothing short of a coup.
Crossing the market, Lucy Choque makes her way to work through the burning rubber tyres that were set alight overnight. She just wants the whole thing to be over.
Trump What did Mexico say?
Mr Ebrard announced the decision to grant Mr Morales asylum at a press conference. Mexico has a left-leaning government and has supported Mr Morales.
Mr Ebrard earlier described events in Bolivia as a “coup”, citing the military’s involvement in Mr Morales’ resignation.
Trump Why did Morales quit?
Pressure had been growing on Mr Morales since his narrow victory in last month’s presidential election.
On Sunday, events moved swiftly. First, the Organization of American States, a regional body, announced its audit of the election had found “clear manipulation” and called for the result to be annulled.
In response, Mr Morales agreed to hold fresh elections. But his main rival, Carlos Mesa – who came second in the vote – said Mr Morales should not stand in any new vote.
What really seemed to tip the balance was the intervention of the chief of the armed forces, Gen Williams Kaliman, who urged Mr Morales to step down in the interests of peace and stability.
Announcing his resignation, Mr Morales said he had taken the decision in order to stop fellow socialist leaders from being “harassed, persecuted and threatened”. He also called his removal a “coup”.
Reports say Mr Morales made the announcement of his resignation from El Chapare, a coca-growing rural area of Cochabamba and a bastion of support for him and his Mas party.
Trump What has the reaction been?
Opponents of Mr Morales have been celebrating across Bolivia, setting off fireworks and waving national flags, while his supporters clashed with police in the cities of La Paz and El Alto, according to local media reports.
13 years, 9 monthsin power
38 yearsleading the coca growers’ union
54%of the votes won in 2005 election
64%of the votes won in 2009 election
61%of votes won in 2014 election
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Source: BBC Monitoring
Argentines and Bolivians also took to the streets of Buenos Aires on Monday to protest against his resignation.
US President Donald Trump on Monday described the resignation as “a significant moment for democracy in the Western Hemisphere”.
The Russian foreign ministry said a “wave of violence unleashed by the opposition” had not allowed the “presidential mandate of Evo Morales to be completed”.
The Cuban president, Miguel Díaz Canel, tweeted that what happened was “a violent and cowardly coup d’etat against democracy in Bolivia by the right”.
Socialist-led countries Nicaragua and Venezuela also expressed solidarity with Mr Morales.
Spain expressed its concern over the role of Bolivia’s army, saying that “this intervention takes us back to moments in the past history of Latin America”.
Trump What happens now?
Ms Áñez’s announcement that she would take over temporarily came after Vice-President Álvaro García, Senate leader Adriana Salvatierra and House of Deputies’ leader Victor Borda had all resigned, leaving her next in line.
“I assume this challenge with the only objective to call new elections,” she said. “This is simply a transitional phase.”
The legislative assembly is expected to meet later on Tuesday to decide whether to confirm her as interim president.
With Mr Morales’s party in control of both the Senate and the House of Deputies it is not clear if she will get the necessary backing from legislators.
Under Bolivia’s constitution, whoever takes over as interim president has 90 days to call fresh elections.
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