Osama Najim was arrested amid claims he used detained migrants in ‘a form of slavery’, but then freed after after a mistake by prosecutors

A Libyan general wanted for alleged war crimes and violence against inmates at a prison near Tripoli has been arrested in the northern Italian city of Turin – and then released after an apparent mistake by prosecutors.

Osama Najim, also known as Almasri, was detained on Sunday on an international arrest warrant after a tipoff from Interpol, a source at the prosecutors office for the Piedmont region confirmed.