An Egyptian human rights group said on Wednesday that a 19-year-old was tortured to death in custody in the Mediterranean city of Alexandria, while the interior ministry claimed the detainee died of natural causes. Mostafa Montaser was arrested on 20 July along with three others on drug possession charges, according to the interior ministry on Tuesday. The three were interrogated by police and the prosecution ordered their detention pending further investigations. “The man in question, known for doing drugs, suddenly felt unwell and was transferred to [a hospital] where he died naturally,” the…