Senegalese police have fired tear gas and chased protesters from the centre of the West African nation's capital in a fourth day of protest against the candidacy of incumbent President Abdoulaye Wade in the February 26 presidential poll.<br /><br />About 100 protesters converged on Saturday in a street leading to Independence Square, which was cordoned off by riot police.<br /> <br />Al Jazeera's Khadija Magardie reports.
