Members of the French gendarmerie intervention forces arrive at the scene of a hostage taking at an industrial zone in Dammartin-en-Goele, northeast of Paris January 9, 2015. The two main suspects in the weekly satirical newspaper Charlie Hebdo killings were sighted on Friday in the northern French town of Dammartin-en-Goele where at least one person had been taken hostage, a police source said. REUTERS/Christian Hartmann (FRANCE - CRIME LAW MILITARY TPX IMAGES OF THE DAY) ATTENTION EDITORS FRENCH REQUIRES THAT FACES SPECIAL INTERVENTION POLICE FORCES ARE MASKED IN PUBLICATIONS WITHIN FRANCE