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Barcelona attack: House explosion which killed one is connected with van strike, police say Barcelona attack: House explosion which killed one is connected with van strike, police say
(35 minutes later)
One person was killed and seven injured in an explosion at a house in Catalonia which investigators are linking to the Barcelona attack, police said.  One person was killed and at least seven injured in an explosion at a house in Catalonia which investigators are linking to the Barcelona attack, police said. 
  The blast, which took place on Wednesday night in Alcanar, was reported to have hurt police officers and firefighters. 
It is believed the explosion was caused by butane gas.
Around 20 bottles of it were reportedly found within the ruins of the house. 
Analysts said the amount of gas found in the house was too much for normal use, and possibly indicated plans for a further attack.
Alcanar lies around 120 miles south from Barcelona. 
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