http://www.bbc.com/news/world-europe-40990927
A 12-strong terror cell that carried out two attacks in Spain this week had collected 120 gas canisters and was planning to use them in vehicle attacks, Spanish police say.
Canisters were found at a house, said to be used by the cell, that blew up in the town of Alcanar on Wednesday night.
Police are still hunting for the driver of the van that hit dozens of people on Barcelona's Las Ramblas, killing 13.
On Sunday, a Mass was held in Barcelona to mourn the victims.
In addition to the 13 killed on Thursday afternoon on Las Ramblas, a woman died in a second vehicle attack early on Friday in the town of Cambrils. Five suspected jihadists were shot dead by police in the second attack.
The Catalan authorities have also confirmed that a British-Australian seven-year-old, Julian Cadman, was among those killed in Barcelona.
He had been declared missing since becoming separated from his injured mother in the attack, and his family had made appeals for news of his whereabouts.
What we know so far
Barcelona tells world 'I'm not afraid'
Barcelona rejects hate after attacks
