US George W. Bush and John Kerry closed out their presidential campaigns with a multi-state blitz seeking decisive votes in an election which, just hours before polling booths open, was locked in a dead heat. Iraq Six Iraqis were killed as violence flared in the flashpoint city of Ramadi as nearby Fallujah braced for an all-out assault with US and Iraqi troops massing in the rebel heartlands. Mideast Three people were killed and dozens wounded when a teenage Palestinian suicide bomber blew himself up in an open-air food market in the heart of Israel's commercial capital Tel Aviv. China At least 20 people have been killed in ethnic clashes between the Muslim Hui minority and the Han majority in central China's Henan province with the area under military blockade, local residents said. China Up to 100,000 farmers clashed with police in southwest China while protesting at compensation payments for farmland requisitioned for a hydroelectric plant, local residents and reports say. Indonesia At least 19 people died in weekend violence in Indonesia's troubled Aceh provice as bloodshed mounted ahead of a key review of military operations to crush a long-running separatist struggle. Afghanistan Militants claiming to hold three UN hostages in Afghanistan said they were being kept in different mountainous locations, and repeated threats to kill them if a rescue attempt was made. Ukraine Ukraine's hotly contested presidential election headed into a second-round showdown between a pro-West candidate and his pro-Russia rival following an inconclusive first-round vote slammed by international observers. Uruguay Tens of thousands celebrated in the streets here after socialist Tabare Vazquez declared victory in Uruguay's presidential election, an historic first for the left in this South American country. Nigeria Nigerian unions clashed in court with the oil giant Shell as the labour movement flexed its muscles ahead of a nationwide general strike, which its leaders have warned will disrupt key oil exports. Botswana President Festus Mogae's party scored a landslide electoral victory in Botswana, winning a new mandate in the southern African country that it has ruled since independence in 1966, results showed. Algeria Algerians celebrated the 50th anniversary of the start of their war of independence with firework displays, cannon salvos and a symphony of car horns and ships' sirens at the stroke of midnight.