Counterterrorism operation underway south of Barcelona van attack

Spanish police reportedly killed four people who were taking part in a possible "terrorist attack," in Cambrils, south of Barcelona.

Local police have also said that one suspect was injured during the shootout.

Emergency services advised on Twitter that people in the vicinity should "stay home, stay, safe," according to Reuters.

Video footage of the alleged scene emerged, where gunshots could be heard amid police sirens.

Hours earlier, a van attack in Barcelona killed 13 people in a busy city square. Members from Islamic State channels have claimed responsibility for the attack.