ROME - A SUSPECTED Italian mobster accused of the killing of six men outside a pizzeria in Germany in 2007 was arrested by Dutch police, ending more than a year on the run as one of Italy's most wanted fugitives, police said on Friday.

Giovanni Strangio is considered a main suspect in the so-called 'Duisburg massacre", in which six Italians were gunned down in a hail of bullets in Duisburg, Germany.

The killings were believed to part of a long-running feud between rival clans of the 'Ndrangheta crime group and revenge for a 2006 Christmas Day killing of Strangio's distant cousin.

Dutch police stormed an apartment in Amsterdam late on Thursday where Strangio had been secretly living with his wife and son. They found at least a million euros in cash.

'There were a lot of apparently forged papers and passports (at the apartment)... and lots of money, probably over a million euros, and a firearm,' Holger Haufmannhe, the head of Duisburg's criminal investigation unit told reporters on Friday.

The mafia in the southern Italian region of Calabria, known as the 'Ndrangheta, has grown into the most powerful Italian crime organisation - bigger than Sicily's Cosa Nostra - with most of its cash coming from drug trafficking.

Renato Cortese, a police chief in Calabria, said authorities found Strangio partly thanks to wiretaps and telephone tracking that gave away his location.

Strangio's brother-in-law, Francesco Romeo, was also arrested and is wanted in Italy, accused of mob activity.

Both Strangio and Romeo are on the Italy's list of its 30 most dangerous fugitives. A third suspect in the killing, Giuseppe Nirta, was arrested in Amsterdam last year. -- Reuters