A van mowed through crowds of tourists on Barcelona's most famous avenue this morning, killing 13 people and injuring scores more in an attack that was claimed by Islamic State.
The head of the Spanish region of Catalonia said two people had been arrested but it was still not clear how many attackers had been involved.
Witnesses said the white van zigzagged at high speed down Las Ramblas, a busy avenue thronged with tourists, knocking down pedestrians and leaving bodies strewn across the ground.
Images showed members of the public - shocked and upset - being escorted out of the cordoned-off area by armed police: