US George W. Bush and John Kerry ended their presidential campaigns with a frenzied multi-state push for decisive votes, with the outcome locked in a breathless dead heat. US As Americans readied to flock to the polls, Florida braced for a massive turnout in a tight, potentially decisive race watched by an army of observers determined to avert a repeat of the 2000 chaos. Iraq Two Arab nationals, a US citizen and an Asian were kidnapped in Baghdad, said an interior ministry spokesman. Mideast A teenage Palestinian suicide bomber blew himself up and killed three other people and wounded dozens in an open-air food market in the heart of Israel's commercial capital Tel Aviv. 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 for a second-round showdown between a West-leaning reformer and his pro-Russia rival after an inconclusive initial vote slammed as undemocratic by international observers. Mideast Palestinian officials voiced optimism about Yasser Arafat's condition, saying the ailing Palestinian Authority president had shown improvement at the start of a crucial week for his political future. China At least 20 people have been killed in clashes between the Muslim Hui minority and the Han majority in central China's Henan province, with the area put under military blockade. Liberia The return of war-displaced Liberians was suspended over fears of more violence following riots in Monrovia that killed at least 16 people, as police stepped up their clampdown on the capital netting hundreds of belligerents. Afghanistan An American soldier was killed and two others wounded when their patrol was attacked by "enemy forces" in southeastern Afghanistan, a US army spokesman said.