Kadre was in contact with Merouane Benhamed in an attempt to produce homemade poison for home-made terror purposes. Kadre was charged with possessing material that could be used to commit terror attacks such as Paris, London, and Strasbourg. He was charged again in February 2003 in France over an alleged plot to concoct a weapon from chemicals. These charges were later dropped for him. On December 16, 2004, in Paris, France, Kadre was convicted and sentenced in absentia to 6 years imprisonment for his role in the 2000 Strasbourg plot. The short prison term suggest that Kadre played a secondary role in the plot. On June 22, 2006, Kadre was extradited to France. Three other men from central and north London were also arrested on 9 November the same day. Two of them were released on police bail and the third was freed with no further action.