Spanish police have released the some of the names of the suspects involved in the terror attacks in Barcelona and Cambrils.
Three who were shot dead by security forces in Cambrils have been identified as Moussa Oukabir, 17, Said Aallaa, 18, and Mohamed Hychami, 24.
Catalonia’s regional police said they were also searching for a fourth suspect, 22-year-old Younes Abouyaaquob.
Police say a total of five men were shot and killed hours after a van was driven at high speeds into crowds of people in Barcelona, killing 13 people.
The two other suspects have not yet been identified.
Spanish media reports say Abouyaaquob is believed to have been the driver of that van, who fled after hitting people along Las Ramblas.
The five men later drove a car into pedestrians in Cambrils on Thursday night.
They were armed with knives and an axe and wore fake explosive belts, according to police.
A single police officer killed four of the five, with Catalan regional police official Josep Lluis Trapero saying it was “not easy” for the officer involved.
:: Who are the victims of Spain terror attack?
A Spanish woman was killed in the attack in Cambrils, while several civilians and a police officer were also injured.
Islamic State said those who carried out the attacks had responded to its call to target countries involved in a US-led coalition targeting the group.
The investigation is also centred on a house in Alcanar, southwest of Barcelona, which was destroyed by an explosion on Wednesday night.
Police believe the house was being used to plan one or several large-scale attacks in Barcelona, possibly using a large number of butane gas canisters stored there.
The apparently accidental explosion at the house forced the suspects to scale down their plans and carry out more “rudimentary” attacks, according to police.
Four men have also been arrested in connection with the attacks – three Moroccans and a citizen from Spain’s North African enclave of Melilla. They are aged between 21 and 34, and do not have a history of terror-related activities.
Authorities have issued arrest warrants for four further suspects in connection with the two attacks.
Moussa Oukabir is the younger brother of Driss Oukabir, whose ID was used to rent the van and whose photo was released by police in the aftermath of the attack.
He has claimed his brother stole his ID and reportedly handed himself in to police in Ripoll after he saw his photo in the media.
The attack is the deadliest in Spain since March 2004, when Islamist militants planted bombs on commuter trains in Madrid, killing 191 people.
Some 126 people were injured in Barcelona and Cambrils, with 17 in a critical condition. The dead and injured came from 34 countries.