Britain Three bombs that spread carnage in packed London Underground trains exploded almost simultaneously at 8:50 am (0750 GMT), police said revealing a chillingly precise attack by suspected Al-Qaeda fanatics. Britain Prime Minister Tony Blair said the underlying cause of terrorism must be "pulled up by its roots" because bombers prepared to massacre innocents cannot be stopped by surveillance. Caribbean Hurricane Dennis gathered strength again as it moved over the Gulf of Mexico away from Cuba, where it killed 10 people and displaced 1.5 million, after causing five deaths in Haiti. Iraq Iraq rebels fired mortars at Baghdad's main oil refinery in a renewed assault on key infrastructure as Egyptian diplomats prepared to leave the city following the murder of Cairo's kidnapped top envoy. Srebrenica Thousands of people lined Sarajevo's main street, many weeping as a convoy carrying the remains of 610 Bosnian Muslims slaughtered in Srebrenica headed for burial a decade after the 1995 massacre, Europe's worst atrocity since World War II Afghanistan Taliban militants in Afghanistan claimed to have beheaded a US special forces soldier they had held hostage since last week, but the US military said there was no proof the soldier had been killed. Beijing US Secretary of State Condoleezza Rice arrived in Beijing for the first leg of a four-nation Asian tour expected to be dominated by efforts to bring North Korea back to talks on its nuclear drive. Sudan Former rebel leader John Garang was sworn in as Sudan's first vice president as a new power-sharing constitution came into force in a bid to put a final seal on two decades of civil war. EU Luxembourg prepared to vote in a referendum over the EU's constitution in what is expected to be a tight contest and which will also decide the political future of the Prime Minister Jean-Claude Juncker, who has vowed to step down if the country votes against the beleagured charter. Philippines The Philippine opposition kept up pressure on President Gloria Arroyo to resign over allegations she cheated in last year's vote, as the military again warned troops to keep neutral in the deepening crisis.