There is pervasive climate of fear in Burundi two years after Nkurunziza changed Burundi's constitution and won a third term in office, which many opposed, said the rights group. More than 400,000 Burundians have fled the country fearing violence since April 2015 when Nkururunziza's candidacy sparked weeks of protests and a failed coup.
Amnesty International said in a report that it interviewed 129 Burundi refugees in camps in Tanzania and Uganda, some of whom escaped persecution by President Pierre Nkurunziza's government as recently as May this year.
"They tortured us to make us confess that we worked with the rebels. One day they tortured us in an atrocious way. They took a bottle filled with sand and hung it from our testicles," he told Amnesty International.
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"Let's be clear, Burundi has not yet returned to normality and the government's attempts to deny the horrific abuses still taking place within the country should not be given credence," Nicholson said.
Despite this, there is mounting pressure on Burundian refugees to return to their home country, the report said. In January this year, Tanzania stopped automatically granting refugee status to Burundian asylum-seekers and Uganda followed suit in June. In July, Nkurunziza in an official visit to Tanzania called on the more than 240,000 refugees there to return home and his remarks were echoed by the Tanzanian president.