Dublin  - An international conference to draw up a comprehensive treaty on banning cluster bombs was due to start Monday in the Irish capital Dublin, with representatives of over 100 governments expected to attend.

The two-week conference organized by the Cluster Munition Coalition (CMC) aims to end the use of cluster bombs, large weapons that spread dozens and even hundreds of smaller bombs, often called bomblets, over a wide area.

Cluster bombs have been condemned as they "cannot distinguish between military targets and civilians so the humanitarian impact can be extreme," a statement from the coalition said Monday.

Unexploded bomblets cause casualties and injuries years after conflicts end, the statement said.

"We are confident that governments will make the right decision and adopt a ban with no exceptions, no loopholes and no delays. This is what is needed to do justice to the victims of this weapon and to stop the maiming and killing of generations to come," CMC coordinator Thomas Nash said.

Pope Benedict XVI spoke in favour of a comprehensive ban Sunday in the northern Italian city of Genoa ahead of the conference.

Also on Sunday, Ireland's Catholic bishops called on the Irish government to adopt the ban, and Catholic organization Pax Christi (Peace of Christ) told national broadcaster RTE it was surprised there was not already a treaty.

Advocates of a ban and survivors of cluster bomb attacks were expected to attend the conference, but the main producers of the weapons - the United States, Israel, China, Russia, India and Pakistan - have said they will stay away, RTE reported Monday. (dpa)