Hasdrubal withdrew to Cartago Nova. The Romans devastated the coastal land as far as the pass of Castulo, which led through the Sierra Morena, north of Cartago Nova. Gnaeus Scipio then headed north gaining the submission of many of the communities north of the Ebro. However, Mandonius and Indibilis, the chieftains of the Ilergetes, got their tribesmen to ravage the lands of the Roman allies. Gnaeus Scipio sent a detachment that easily defeated them. Meanwhile the Celtiberians (who lived in east-central Hispania) invaded the area near Cartago Nova. They seized three fortified towns, defeated Hasdrubal, killed 15,000 and took 4,000 prisoners.