Spanish stocks slumped Friday, fronting a sell-off across European equity markets a day after a terrorist attack killed at least 13 people in the heart of Barcelona, MarketWatch reports.

More than 100 people were injured in Spain’s second-largest city in a Thursday afternoon attack claimed by Islamic State, and the death toll could rise, officials said. Hours later, police killed five alleged terrorists as they responded to a separate attack that hurt seven people in Cambrils, a town southwest of Barcelona, the Catalan government said.