Italian police have arrested at least 10 suspected Islamist militants who are believed to be linked to the bombings that rocked Algiers in April.
The Algiers bombings followed a period of relative calm
The suspects, held in Milan, allegedly provided logistical and financial support for the militants in Algeria.
Two blasts killed at least 30 people and injured 160 in Algiers.
A group called the Salafist Group for Preaching and Combat said it carried out the attacks. It later changed its name to al-Qaeda in the Maghreb.
Police said the suspects were also believed to be linked to Islamist activities in Tunisia in January.
The Milan suspects are reported to be Tunisians.
One of those targeted by police was named as Essid Sami Ben Khemais. He was about to leave jail after serving a sentence of six years and two months, but now a new detention warrant has been served for him, the Italian news website Il Giornale says.
The police raids followed a tip-off from Tlili Lazar, an Islamist extradited from France in November 2006, who is now co-operating with police, Il Giornale says.