French officials filed preparatory terrorism charges on Thursday against a Frenchman expelled from Bulgaria and connected to terrorists behind fatally assaults in Paris, a judicial official said. Fritz-Joly Joachin was commanded imprisoned for not less than four months pending further examination, the official said. He was detained on Jan. 1 on a French warrant while attempting to cross from Bulgaria into Turkey.

French police say that Joachin, 29, was a member of the Kouachi brothers, who finished off 12 people in an assault on Jan. 7 against newspaper Charlie Hebdo.