Spanish police treating knife assault as 'terrorist attack' A police officer shot dead a man armed with a knife as he tried to attack a police station in Catalonia, just days after the one-year anniversary of a twin attack in the northern Spanish region that killed 16 people. "This investigation has been initiated and treated as a terrorist attack," Rafel Comes, a commissioner with the Catalan regional police tells a news conference in Cornella. SOUNDBITE