Report: Sleeper Cells Activated in France

Law enforcement officers in France were told to erase their social media presence and carry their weapons at all times as terror sleeper cells have been activated in the last 24 hours, a French police source who attended a briefing Saturday told CNN terror analyst Samuel Laurent.

Ahmedy Coulibaly, a suspect killed Friday during a deadly kosher market hostage siege, had made several phone calls about targeting police officers in France, according to the source.