An Italian mafia boss has died in prison, prompting an urgent manslaughter investigation.
Cosimo Di Lauro, 48, had been sentenced to life in Opera prison in Milan, and was said to be one of the most ruthless and cold-hearted bosses in the Camorra mafia organisation.
The group is based in and around the Italian city of Naples, and the organisation's top don had overseen one of the biggest wars in Italian mafia history, with a war responsible for the deaths of over 150 associates across an eight-month period in 2005 and 2006.