Sylvain Cherkaoui, photojournaliste

A man is being treated after having suffered from tear gas in Dakar on February 18, 2012. Senegal riot police clashed with rock-throwing protesters today, firing teargas and water cannon for the fourth day running as fresh violence hit the capital a week before highly divisive polls. The opposition has been banned from protesting in central Dakar, leading to a second day of cat-and-mouse battles with police in the seaside capital who were trying to prevent them from gathering at Independence Square..©Sylvain Cherkaoui