Hours after the first deadly attack, a second took place in the coastal town of Cambrils, where police foiled another auto attack that killed one person and injured six others, including a police officer.
One of the suspects involved in the Barcelona attack was found dead in a auto three kilometers from where police officers tried to stop him by firing at the vehicle he was in, reports El Pais.
A van veered onto a promenade Thursday and barreled down the busy walkway in central Barcelona, swerving back and forth as it mowed pedestrians down and turned a picturesque tourist destination into a bloody killing zone.
The list of dead suspects includes Omar Hychami, 21, born in Morocco; 19-year-old Moroccans Houssaine Abouyaaqoub and Said Aallaa; Mohamed Hychami, 24, born in Morocco and Moussa Oukabir, 17, according to Europa Press.
But police told reporters the fifth man had not yet been identified and nor had the Barcelona driver.
The Spanish government said it now considered the cell behind the attacks out of action, though police in Catalonia would not confirm this.
Confusion still reigns over the identity of the van driver. These involved vehicles ploughing into pedestrians in Barcelona and then again in the seaside city of Cambrils some eight hours later. He added that the terror threat level would remain at four, meaning the threat is "high", rather than increasing it to level five, which means an attack is believed to be imminent.
The attacks may be connected to an explosion on Wednesday at a house in Alcanar south of Barcelona, according to authorities.
Sources tell CBS News the terrorists were planning a larger attack - possibly a vehicle bomb using gas canisters being constructed in a house just down the street. Victims of the attack included an American whose name has not yet been released, and there were at least 34 nationalities representing people who were either killed or injured during the two incidents.