 Political turmoil in Bolivia. Backers of the country's president and his predecessor have battled in the streets of the government capital as an electoral court debates the rules for next year's national election. Several people were injured in the clashes, including the mayor of La Paz, who turned up at the demonstrations to appeal for calm. The two left-wing politicians used to be close friends and allies, but they've been fighting over their right to represent the governing mass party in the presidential poll.