An anti-globalisation group planning protests at July's Group of Eight meeting in the Italian city of Genoa has said it will make every effort to disrupt the summit.
"We will block the G8," Luca Casarini, spokesman for the radical Tute Bianche group, told a news conference. Tute Bianche activists are known for marching in the frontline of protests dressed in white overalls.
The group is part of the Genoa Social Forum, a wider network of 324 associations organising a counter-summit during the G8 meeting of world economic powers.
Casarini said the group was responding to a decision by Italy's outgoing centre-left government to use the army to guarantee security during the meeting.
"We will seek to enter areas sealed off for the G8, using only our bodies," he said, reading a communique drafted by the group and addressed to the Italian and US governments and to the two countries' secret services.
The Genoa Social Forum network has said it expects some 100,000 protesters to go to the northern port city to demonstrate against the July 20-22 summit.
The network said earlier this week fears that the protests would be violent were unfounded.
Anti-globalisation protests have become a regular characteristic of international conferences with economic dimensions since protesters targeted a World Trade Organisation meeting in Seattle in December 1999.