1. A terror attack in Barcelona, Spain, killed at least 13 people and wounded more than 80 others when a van zigzagged through a crowd at a popular tourist spot.

Two people were later arrested, including a Moroccan man whose identification documents had been used to rent the van. But the police said neither was believed to be the driver, who remained at large.

The Islamic State claimed that the perpetrators were its “soldiers,” adding Spain to the list of European countries — including France and Britain — where vehicles have been used in attacks on civilians.