Ugandan opposition leader Kizza Besigye has been injured after the military opened fire to disperse protesters in the capital, Kampala. For the second time this week, the opposition asked people to walk to work to protest against rising prices. Police had tried to arrest Dr Besigye but hundreds of his supporters surrounded him. Eyewitnesses say the army then stepped in and during the effort to arrest him he was shot in the arm. The injured opposition leader was then driven away by the military. Dr Besigye was defeated by President Yoweri Museveni in February's presidential election but says the poll was rigged. Before the vote, he had called for Egypt-style uprisings in case of fraud. The police responded by banning public demonstrations. Barricades Several opposition politicians were arrested by the police in other parts of Kampala as they took part in the "walk-to-work" protest. Opposition supporters tried to set up barricades and the police have also sealed off many roads in Kampala. Protests against high food and fuel prices are also taking place in other towns. The BBC's East Africa correspondent Will Ross says opposition started the walk-to-work campaigns on Monday, aware that any attempt to demonstrate in one place would be swiftly broken up by police. Those who participated were small in number. Opposition politicians, including Dr Besigye, were arrested, charged with inciting violence and later released. Monday's police action was widely condemned by human rights groups and foreign embassies. The Uganda Law Society said restrictions on constitutional freedoms were turning Uganda into a police state. Dr Besigye has been defeated by Mr Museveni in three presidential elections, gaining 26% to the president's 68% in February. The pair used to be allies - Dr Besigye was once Mr Museveni's personal physician. Source: BBC