An elderly woman is escorted away from tear gas smoke by a riot policeman during clashes between Tunisian police and protesters following a rallye outside the Interior ministry to protest after Tunisian opposition leader and outspoken government critic Chokri Belaid was shot dead, on February 6, 2013 in Tunis. The protesters, who massed on Habib Bourguiba Avenue, epicentre of the 2011 uprising that ousted ex-dictator Zine El Abidine Ben Ali, pelted the police with bottles and the police responded by firing tear gas, chasing the protesters and beating them with batons.