Police in Catalonia, Spain said early on Friday that they killed five terrorists in the coastal town of Cambrils.
The individuals, who were wearing suicide belts, were linked to Thursday's van attack in Barcelona as well as Wednesday's gas explosion in the municipality of Alcanar, police stated. The five suspects were believed to be planning a separate assault following events in Barcelona.
Six civilians and one police officer were also injured during the police raid, authorities said, adding that residents of Cambrils should avoid the street because of ongoing police operations.
People in Cambrils should "stay home, stay safe," Catalan emergency services said on Twitter.
On Thursday, a vehicular assault in the center of Barcelona killed at least 13 people. The Islamic State has claimed responsibility for the act and two people in connection with the attack have been arrested, local authorities said.
—Reuters and CNBC staff contributed to this report.