A van ploughed into crowds in the heart of Barcelona on Thursday and Spanish media reported at least 13 people were killed, in what police said they were treating as a terrorist attack.

The death toll was reported by Cadena Ser radio, citing police sources. Police said some people were dead and injured but did not confirm the number of casualties. They said were searching for the driver of the van.

Spanish newspaper El Periodico said two armed men were holed up in a bar in Barcelona’s city centre, and reported gunfire in the area, although it did not cite the source of the information.

It was not immediately clear whether the incidents were connected.

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