DUBAI( REUTERS)-The head of Iran's prisons apologised on Tuesday( Aug 24) for" bitter events" in Teheran's Evin prison after videos leaked by hackers showed beatings of prisoners, a rare admission of abuse by the authorities.A hacking group calling itself Edalat-e Ali, or" Ali's Justice", issued on social media the videos that appear to be from the prison's surveillance cameras and show guards beating prisoners and dragging a detainee on the floor." Regarding the pictures from Evin prison, I acc