A group calling itself the Xosé Tarrío Clandestine Antiprison Unit has claimed responsibility for a bombing that took place early Monday morning just outside an apartment building on Calle Las Luciérnagas in La Reina.
The explosion could be heard throughout a 15-square-block area, damaging nearby buildings and vehicles while sowing panic among neighborhood residents.
According to Carabineros sources, pamphlets were left behind containing anarchist-style ultimatums and references the “Caso Bombas”.
It was determined that the bomb consisted of a fire extinguisher filled with black powder, which was detonated by a match-lit fuse.
From: http://www.lasegunda.com/noticias/nacional/2011/03/631105/grupo-anarquista-que-perpetro-bombazo-en-la-reina-amenaza-con-atacar-un-colegio