Prefecture

The provided news articles do not mention any organization or entity called "Prefecture." Therefore, it is impossible to provide a summary about it based on the given information. The articles detail two separate incidents in France: one involving clashes between police and participants at the end of a carnival in Marseille, resulting in injuries to seventeen police officers, and another concerning the death of an 81-year-old voter at a polling station in Annecy, leading to the temporary closure of the voting location. These events are newsworthy due to the public safety concerns raised by the Marseille clashes and the disruption of the electoral process in Annecy. Without any mention of "Prefecture," its relevance or significance cannot be assessed.