Spanish police said on Monday they had shot a man armed with a knife as he tried to attack a police station in the northeastern region of Catalonia.
Regional police said on Twitter the man had entered the police station in Cornella, near Barcelona, "with the aim of attacking the officers" adding he had then been shot.
State broadcaster RTVE said the attacker was a 29-year-old Algerian resident in Cornella with Spanish identity documents and had been killed by the gunshot.
"Right now we are treating this as a terrorist attack," regional investigative police chief Rafel Comas told a news conference, adding that the attacker had said "Allah is great".
Last Friday, Barcelona commemorated the first anniversary of an Islamist assault in which a young man drove a van down a busy central boulevard, killing 14 and injuring over 100 in Spain's worst attack in more than a decade.