A total of 13 people have been arrested and extra police have been deployed after an attack on a pensioner sparked anti-migrant unrest in a small town in southern Spain.Three people of North African origin have been detained on suspicion of attacking the 68-year-old man in Torre Pacheco last Wednesday.

Prosecutors said the local head of Deport Them Now, an anti-immigrant group, helped incite four days of violence that have rattled a town with a large North African community.

Five people were hurt and one was arrested during the unrest in the town on Saturday, according to local officials. The town was quieter on Sunday, but government sources said more arrests were expected.