ROQUETAS DE MAR (Reuters) -- Immigrants went on a rampage in a southern Spanish town overnight, setting fire to homes and cars and throwing stones at police, after a Senegalese man was stabbed to death, police said on Sunday.

Police said the killing of the 28-year-old man in the town of Roquetas de Mar, in the province of Almeria, led to ""a numerous concentration of Africans, which degenerated into violence and public disorder.""
""For reasons which the police are investigating, (the man) was attacked by a person from the neighborhood who police are looking for,"" a police statement said.
A witness said the man was killed as he tried to intervene in a dispute between Senegalese and gypsy families in the area.
Rioters also set fire to two homes belonging to family members of the man they believed killed the Senegalese man, said police. They also burned various parked cars.
A policeman who went to the scene told national radio station RNE that rioters attacked firefighters with stones.
""They began to throw stones at the cars...They ended up destroyed, with broken windows, dents in the doors, at the front. The only thing there wasn't was injuries,"" policeman Carlos Manuel Ruiz said.