[JURIST] Belgian prosecutors said Monday that they have charged a fourth suspect in connection with the Paris attacks. Mohammed Amri and Hamza Attou have been charged [BBC report], along with two unnamed individuals, for aiding Paris attacks suspect Salah Abdeslam, who remains at large. The four individuals charged were among 16 arrested as police conducted 22 raids [BBC report] on Sunday throughout Brussels and Charleroi. Brussels remains under the highest security threat level with schools and transportation systems inactive, but they are expected to reopen on Wednesday.

Last week the French National Assembly voted to extend the state of emergency [JURIST report] in France for an additional three months. Paris’ chief prosecutor François Molins reported the day after the attack that several arrests [JURIST report] had already been made, and numerous raids have since been conducted in France and Belgium. Organized in three teams, terrorists reportedly connected to the Islamic State (IS) [JURIST backgrounder] perpetrated attacks on six different targets in and around Paris. Speaking about the attacks generally, French President François Hollande called them [BBC report] “an act of war,” and vowed that the French “will lead the fight, and we will be ruthless.” A UN rights expert also commented last week that the attacks may amount to crimes against humanity [JURIST report]. It is not yet clear if France will invoke [JURIST op-ed] Article 5 of the North Atlantic Treaty [text] to call on allies to help fight IS, as the US did in the wake of the 9/11 attacks.