A small bomb exploded Saturday in a park in the northwestern city of Santiago de Compostela after a warning call on behalf of the Basque separatist group ETA, a government official said. The explosive device went off in the Parque de la Alameda, in the heart of this pilgrimage city, around 12 p.m. (1000 GMT) causing little damage and no injuries, said the spokeswoman. Several small bombs have gone off in northern Spain in recent weeks following warnings in the name of ETA. On Saturday, a caller told the pro-Basque daily Gara that a device had been planted in the park in Santiago and another in the nearby city of A Coruna. The targeted area in A Coruna was cordoned off and a hotel and social club evacuated. By 1 p.m. (1100 GMT), no explosives had been found. ETA has killed more than 800 people in its three-decade-old campaign for an independent Basque country in lands straddling northern Spain and southwest France. Spain's previous government waged a relentless fight against the group and chalked up nearly 200 arrests, including those of senior leaders. ETA's last fatal attack was in May 2003.