Just days before world leaders were due to arrive, Russian security forces said they had foiled alleged Chechen rebel plans to attack towns in the North Caucasus with cyanide-based poison and explosives.

• 就在世界各国领导人到达的前几天，俄罗斯安全部队说他们挫败了车臣反叛武装计划用氢化物毒品和炸弹袭击北高加索城镇的阴谋。