November 2015 Paris attacks

=== Intelligence review ===
[[File:Paris Shootings - The day after (22593744177).jpg|thumb|French police gathering evidence at the Bataclan theatre on 14 November]]

Shortly after the attacks, intelligence staff in multiple countries began to review electronic surveillance recorded before the attacks.<ref name="Nossiter 2015" /> [[Adam Schiff]], the [[Ranking member|ranking Democratic member]] of the [[United States House Permanent Select Committee on Intelligence]], said he did not know of any intercepted communications that would have provided warning of the attacks.<ref>{{cite news|title=U.S. reacts to Paris attacks; officials unaware of prior 'chatter'|url=http://www.journalnow.com/news/nation_world/u-s-reacts-to-paris-attacks-officials-unaware-of-prior/article_b4c24762-8a72-11e5-9423-5f7fb85bd671.html|website=Winston-Salem Journal|agency=Associated Press|access-date=14 November 2015|archive-url=https://web.archive.org/web/20171010120421/http://www.journalnow.com/news/nation_world/u-s-reacts-to-paris-attacks-officials-unaware-of-prior/article_b4c24762-8a72-11e5-9423-5f7fb85bd671.html|archive-date=10 October 2017|url-status=live}}</ref>

One source said the French National Police met with German police and intelligence services a month before the attack to discuss suspicions that terrorists were staking out possible targets in France. The exact targets were not known at that time.<ref name="sofrep">{{cite web|last1=Murphy|first1=Jack|title=Breaking: French and German Police Knew Paris Attack Was Coming a Month Prior|url=http://sofrep.com/44480/french-and-german-police-knew-paris-attack-was-coming-a-month-prior/|website=SOFREP.com|access-date=14 November 2015|archive-url=https://web.archive.org/web/20151115011102/http://sofrep.com/44480/french-and-german-police-knew-paris-attack-was-coming-a-month-prior/|archive-date=15 November 2015|url-status=live}}</ref>

Police in Germany stopped a car on 5 November, arrested its driver, and confiscated weapons that may have been connected to the Paris attacks.<ref>{{cite news|title=Man Arrested in Germany With Weapons in Car May Have Links To Paris Attacks|url=https://www.huffingtonpost.com/entry/paris-attacks-weapons_56474262e4b06037734934e0|website=The Huffington Post|agency=Associated Press|access-date=14 November 2015|archive-url=https://web.archive.org/web/20151115044348/http://www.huffingtonpost.com/entry/paris-attacks-weapons_56474262e4b06037734934e0|archive-date=15 November 2015|url-status=live}}</ref>

Some of the attackers were known to law enforcement officials prior to the attacks, and at least some of the attackers lived in the [[Sint-Jans-Molenbeek|Molenbeek]] area of Brussels, which is noted for its links to extremist activities.<ref name="CoordinatedAttacks" /> A counter-terrorism expert said the fact that the perpetrators were known to authorities suggested that intelligence was "pretty good" but the ability to act on it was lacking. The number of Europeans who have links to Syria makes it difficult for security services to keep track of them all.<ref>{{cite news|last1=Higgins|first1=Andrew|last2=DE FREYTAS-TAMURA|first2=KIMIKO|last3=BENNHOLDNOV|first3=KATRIN|title=In Suspects' Brussels Neighborhood, a History of Petty Crimes and Missed Chances|url=https://www.nytimes.com/2015/11/17/world/europe/in-suspects-brussels-neighborhood-a-history-of-petty-crimes-and-missed-chances.html|work=The New York Times|date=17 November 2015 |access-date=17 November 2015|archive-url=https://web.archive.org/web/20151117101804/http://www.nytimes.com/2015/11/17/world/europe/in-suspects-brussels-neighborhood-a-history-of-petty-crimes-and-missed-chances.html|archive-date=17 November 2015|url-status=live}}</ref>

On 26 December 2015, "Belgian newspaper ''De Morgen'' reported that a police oversight body, known as Committee P," is investigating why prior warnings from a school about the radicalisation of one of the attackers, Bilal Hadfi, were not reported to Belgian law enforcement.<ref>{{Cite news|title = School's Warnings About Paris Attacker Were Not Passed On|url = https://www.nytimes.com/2015/12/27/world/europe/schools-warnings-about-paris-attacker-were-not-passed-on.html|newspaper = The New York Times|date = 26 December 2015|access-date = 26 December 2015|issn = 0362-4331|first1 = Sewell|last1 = Chan|first2 = Milan|last2 = Schreuer|archive-url = https://web.archive.org/web/20151226233001/http://www.nytimes.com/2015/12/27/world/europe/schools-warnings-about-paris-attacker-were-not-passed-on.html|archive-date = 26 December 2015|url-status = live}}</ref>

On 8 March 2021, [[Italy|Italian]] police arrested a 36-year-old [[Algeria]]n man on suspicion of helping authors of the Paris attacks and for belonging to the [[Islamic State group]]. It was reported that he had "guaranteed the availability of forged documents" to the Paris attackers.<ref>{{cite web|url=https://www.france24.com/en/live-news/20210308-italy-arrests-forger-over-links-to-2015-paris-attack|title=Italy arrests 'forger' over links to 2015 Paris attack|access-date=8 March 2021|website=France 24|date=8 March 2021}}</ref>