Rome  - Italian police arrested Friday 10 mafia suspects, including alleged members of two mob families linked to the murder of six Italians killed in an August 2007 shooting in Duisburg, Germany, news reports said.

The suspects were picked up in morning raids in the southern town of San Luca - the traditional stronghold of the 'Ndrangheta, the Calabrian version of the mafia - as well as in nearby Locride and in the northern cities of Udine and Bologna.

German news reports that some of those arrested may be directly linked to the Duisburg killings could not be immediately confirmed.

Two women, Maria Pelle and Antonella Vottari, the wife and sister of prominent 'Ndrangheta boss, Francesco Vottari, who was arrested in October 2007, were among those arrested, Italian news reports said.

The 10 suspects all allegedly belong to either one of two San Luca-based Nirta-Strangio and Pelle-Vottari crime families.

The families have been locked in a bloody feud since the early 1990s. Victims are believed to include the six killed in Duisburg. (dpa)