Thousands of migrants have attempted to cross the border from Morocco to the Spanish enclave of Ceuta in the last few days, including hundreds of youth who tried to swim their way around controls, Spanish authorities said Monday. Videos broadcast on Spanish media over the weekend showed Spanish police intercepting migrants in the water at night amid a thick fog but also in broad daylight, struggling to separate the new arrivals from crowds of beachgoers. Cristina Pérez, the Spanish government’s representative in Ceuta, told journalists Monday that since Thursday an average of 700 people had at…