Hundreds of migrants entered Spain's North African enclave of Ceuta, many swimming and using inflatable devices to cross from Morocco, while others slipped through a breach in the border fence.
Juan Jesús Vivas said "the number of arrivals has been overwhelming resources and urged the Spanish authorities to intervene."
Spanish media estimated that between 2,000 and 3,000 people entered Ceuta on Thursday, according to Reuters, although the Guardia Civil has not confirmed the figure.
Ceuta, located on Morocco's northern coast, has long served as a focal point for migrants seeking to reach Europe.