Car bomb explodes in northern Spanish city of Madrid . Basque president : kills a national police officer named Eduardo Puelles . A car bomb exploded Friday morning in Spain 's northern Basque region , killing a police officer inside the vehicle , officials said . Spain : It was caused by a limpet bomb placed underneath the car . Events in Basque country at heart of long - running separatist conflict .
Car bomb explodes in northern Spanish city of Madrid . Basque president : kills a national police officer named Eduardo Puelles . Spain : It was caused by a limpet bomb placed underneath the car . Events in Basque country at heart of long - running separatist conflict .