Islamic extremists could have snuck into Europe alongside violent criminals who were among the 60,000 migrants who swam into Ceuta last week.Police are said to be analysing footage of the mass border breach and combing the streets of Spain's North African enclave to try to identify possible jihadists officials believe could have taken advantage of the crisis to reach EU soil.Migrants who managed to reach Ceuta have openly admitted to violent crimes in interviews, with one confessing to a bottle attack on another man during a previous spell in Europe which led to him being deported back to Morocco.Spanish news website ElConfidencial, citing police sources, reported today: 'The threat of international terrorism has often been used by the far right to attack the phenomenon of illegal immigration, but Interior Ministry sources admit that, on this occasion, there is a real danger that among the more than 60,000 people who have crossed into Ceuta there are jihadists.'It added, saying violent criminals were known to have stayed on in Ceuta after breaching the border: 'The priority of the security forces is to locate the most dangerous men among those who have not returned.'Amid the chaos of the first few hours, some immigrants acknowledged before the television cameras deployed at the Ceuta beach El Tarajal that they had been expelled to Morocco by the authorities of Spain and other European Union countries after serving sentences for serious crimes, and that they had taken advantage of the confusion to re-enter the territory.'Other immigrants told the media that they had been in Moroccan prisons for violent crimes.'Intelligence officers from the Civil Guard and the National Police are now reviewing those videos to search for those individuals and others with similar criminal records who were more discreet and did not stop in front of the cameras to recount their criminal histories. Migrants who managed to reach Ceuta have openly admitted to violent crimes in interviews, with one confessing to a bottle attack on another man during a previous spell in Europe which led to him being deported back to Morocco Migrants, many of them from Sudan, take part in evening prayers on Playa del Trampolan in Ceuta after arriving in the Spanish enclave during the recent mass migration surge from neighbouring Morocco Migrants sleep while waiting on a beach following mass crossings of migrants on foot and by sea'In addition, they are examining recordings from the border perimeter and the city, and have turned to the security forces' usual informants to locate those people.'One migrant, speaking about time he had already spent in Europe, revealed he had been deported to his native Morocco from Holland after fleeing Spain following a bottle attack on another man.He initially attributed his expulsion to a 'family problem' before revealing the true reason.The 35-year-old told programme En Boca de Todos on Spain's Cuatro channel, revealing he had a Spanish passport which was taken away from him and he needed medical attention for a broken arm and his hepatitis C: 'I was living in Barcelona and I liked alcohol and got into a lot of problems.'One day I crossed paths with an Algerian b*****d and bottled him. I fled Spain and went to Holland afterwards.'I was stopped one day and asked for my ID and I explained to the police there I had just arrived from Morocco.'I ended up being taken to a migrant holding centre where I spent six months and was allowed out in a courtyard for an hour a day.'I was finally offered €2,000 to go back to Morocco and I agreed to that because I didn't want to spend another six months in that centre.'