The United Nations has called on Greece to drop all charges against 24 migrant rescue workers accused of espionage, as hearings of a long-delayed trial resumed on Friday on the island of Lesbos Those on trial include prominent Syrian human rights worker Sarah Mardini, a refugee and competitive swimmer whose sister Yusra Mardini was part of the refugee swimming team at the Olympic Games in 2016 and 2021. The Syrian siblings were celebrated for their efforts to save 18 fellow passengers when they helped drag their sinking refugee dinghy to safety on the journey from Turkey to Greece in 2015. Their story was later turned into the Netflix film – The Swimmers. “Trials like these are deeply concerning because they criminalise life-saving work and set a dangerous precedent. Indeed, there has already been a chilling effect,” UN rights office spokeswoman Liz Throssell told reporters at a briefing in Geneva, calling for “all charges against all defendants” to be dropped. The Greek and foreign defendants argue they were doing nothing more than assisting people whose lives were at risk. The Greek trial is “emblematic of a broader trend towards the EU disrupting people’s journeys and deterring people from reaching Europe, often leaving them trapped in dire conditions or at risk at sea, rather than protecting them along their journeys or providing routes to safety”, he said. Greece, which saw about a million people cross to its shores from neighbouring Turkey at the height of a refugee crisis in 2015, has clamped down on migration, erecting a fence along much of its land border with Turkey and increasing sea patrols near its islands. Greek officials say they have a strict but fair migration policy. They also deny, despite increasing evidence to the contrary, conducting illegal summary deportations of people arriving on Greek territory without allowing them to apply for asylum, a procedure known as “pushbacks”.