Residents of Catalan house where explosion killed 1 were preparing explosives -police source
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Residents of a house in Catalonia, where an explosion linked to Thursday's Barcelona van attack killed one person, were preparing explosives using gas cyclinders, a Catalan police source said.
Police said earlier that the explosion, about 100 km (62 miles) southwest of Barcelona in the town of Alcanar, was related to the van attack, which so far has left 13 people dead.
