Madrid, Aug. 3 -- At least 3,000 undocumented migrants remain in Spain's North African enclave of Ceuta after a mass influx from Morocco last week, the city's mayor said on Monday, as European union officials prepared to discuss the crisis on August 4.

Ceuta Mayor-President Juan Jesus Vivas said around 80,000 people crossed into the Spanish territory over four days, describing the arrivals as a violation of Spain's territorial integrity.

"Four days later, between 3,000 and 5,000 migrants remained in the city," Vivas was quoted as saying by Spanish news agency Europa Press.

The mayor said the number of arrivals was comparable to Ceuta's total population, which stands at around 85,000.

Spanish authorities deployed additional police, Civil...