This is how Juan, a young man aged around 20, begins his story. He alleges he was physically and psychologically tortured by Venezuelan security forces after being detained in connection with the presidential elections on 28 July.

He was one of many hundreds of people arrested during protests after the electoral authorities - which are dominated by government loyalists - announced that the incumbent, Nicolás Maduro, had won.

"They have already tortured me and repressed me, but they will not silence me. My voice is the only thing I have left." https://www.bbc.co.uk/news/articles/ckgz5l6l7k7o