Thousands of migrants remained stranded in Spain's North African city of Ceuta as of Tuesday, following a chaotic mass crossing from Morocco that overwhelmed the enclave's border. European Union officials have offered emergency assistance to reinforce the border, while Spanish authorities are investigating the possibility that criminals or suspected jihadists exploited the surge to enter European territory undetected.

Spanish officials reported that approximately 72,000 people entered Ceuta from Morocco, with about 70,000 having since returned. This left roughly 2,000 individuals in the territory, straining reception facilities. Authorities are processing 862 migrant minors, who are afforded special protections under Spanish law and cannot be summarily returned. Reports indicate that children have been sleeping outside due to the overwhelmed youth shelter.

The European Commissioner for Internal Affairs and Migration, Magnus Brunner, stated that the unprecedented crossing was fueled by criminal smuggling networks and disinformation spread via social media. Spanish authorities are examining individuals remaining in the territory against criminal and counterterrorism databases. Sources within the Spanish Interior Ministry acknowledged that the sheer scale of the surge presented a genuine risk of infiltration.

Concerns are heightened by Ceuta's proximity to Fnideq, a Moroccan border town with a history of jihadist recruitment investigations. Previous extremist cells have operated across the Ceuta-Fnideq border area, and hundreds of individuals from northern Morocco traveled to join ISIS and other groups in Syria and Iraq during the mid-2010s.

The crisis is also creating an opportunity for Islamist movements seeking to undermine confidence in Morocco's government, according to research fellow Zineb Riboua. She noted that Moroccan Islamists have long criticized the monarchy as too secular and pro-Western, while promoting an idealized image of Europe. The Ceuta crisis allows these movements to channel public frustration over migration, unemployment, and economic conditions into a broader political attack on the Moroccan state ahead of national elections in September.

Evidence has also emerged of an extensive online mobilization campaign preceding the mass crossing. An open-source intelligence report traced weeks of activity across social media platforms, including misleading interpretations of Spanish immigration law and practical information about routes and crossing times. This campaign accelerated following a Spanish Supreme Court ruling concerning the immediate return of migrants intercepted at sea near Ceuta and Melilla. Simplified and misleading interpretations of this decision, combined with confusion about Spain's policy to regularize undocumented migrants, were circulated online, creating the impression that those who reached Spanish territory would be allowed to remain.

Morocco's Interior Ministry spokesman, Rachid El Khalfi, attributed the surge to several factors, including the exploitation of digital platforms, misleading information, human-trafficking networks, and inaccurate interpretations of legal developments. He stated that messaging created a false impression of an open border. Moroccan prosecutors have opened investigations to identify those responsible.

Intelligence assessments suggest that Morocco did not plan the mass crossing but allowed it to unfold as border controls were gradually relaxed. Spain's Interior Minister Fernando Grande-Marlaska stated that the nation's foreign intelligence agency had not warned him of an impending surge of such magnitude. However, the president of the autonomous city of Ceuta, Juan Jesus Vivas Lara, offered a different assessment, telling El País that many residents believed Morocco had allowed, if not orchestrated, the surge. He added that Morocco had demonstrated unreliability and that measures must be put in place to prevent recurrence.

Morocco has denied deliberately orchestrating the crossing, reiterating its commitment to international cooperation against irregular migration and human trafficking. Spanish Foreign Minister José Manuel Albares defended Rabat's response, stating that Moroccan authorities provided police support and facilitated the return of most individuals who crossed.