Spanish police say a bomb exploded Wednesday in the northern Basque city of Bilbao.

Police say they evacuated offices of a regional television station (EITB) after a warning call in the name of the armed group ETA informed them that a bomb would explode soon in the area.  Police have not reported any injuries.

Emergency services say they found a suspicious vehicle after closing off the area.  They say they found the vehicle's owner tied up on a mountain in a nearby town.

ETA has killed more than 825 people since its campaign for an independent Basque state in northern Spain and southwestern France began in 1968.  Recently, police in France have arrested many suspected members of the group.  

Some information for this report was provided by AFP, Reuters.