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The attack was a botched robbery at the Mercadona supermarket in the neighborhood of As Lagoas, in Ourense.

An armed man entered the shop and fired several shots into the air while shouting 'Allahu Akbar' around 2.20pm local time.

Police said he carried gasoline and gunpowder in his pockets.

(Image: TWITTER)

The man has since been arrested.

Witnesses said they heard screams from outside and saw two armed policemen shouting at pedestrians to "get away".

One said: "Agents came out shouting and pushing the people: he is armed, he is armed."

(Image: TWITTER)

Policeman Carlos Perez said: "He fired on me."

But the guy stopped shooting when he saw the officer's weapon.

"I had the impression that he ran out of ammunition," the officer added.