This report is an enquiry into the radical religious movements in Senegal that are capable of taking advantage of the regional context and unpredictable circumstances to engage in violent actions. Methodologically, this preliminary study is based on media reports, semi-structured interviews with various actors and a public opinion survey with 400 respondents conducted in February and March 2013 in Dakar and its suburbs, in the city and département of Saint-Louis as well as in Thiès and Mbour. Because of the difficulties in measuring a phenomenon such as radicalism, the method adopted is a qualitative analysis of the responses gathered during interviews and in questionnaires.