Following the deaths of four people during a fire and riots in a notorious Tehran prison holding political prisoners, the EU’s foreign policy chief Josep Borrell has called for Iran to explain the origins of the incident. “We expect maximum transparency on the situation,” Borrell said on Twitter, noting that the Iranian authorities are responsible for the lives of all Evin Prison detainees, including human rights activists and EU citizens. Authorities have so far provided few details on what prompted the fire or the violence, which comes amid weeks of mass unrest across Iran against the countr…