Reggio Calabria, Italy - Italian police arrested Thursday a wanted Calabrian mafia boss who is the brother-in-law of a chief suspect in the August 2007 killings of six Italians in Duisburg, Germany, news reports said.

Police blocked the 31-year-old Paolo Nirta, after a short chase on foot down the narrow alleys of San Luca, a town considered the stronghold of the Calabrian version of the mafia, the 'Ndrangheta.

Nirta is the suspected acting-boss of the Nirta family which has been locked in a bloody fued with a rival clan, the Pelle-Vottari family, since the early 1990s.