The Wall Street Journal: U.K. lowers terror threat after second arrest in subway bombing

SUNBURY-ON-THAMES, ENGLAND — Investigators probing a bomb blast that injured more than two dozen people in London’s subway last week combed through a house in this suburban town owned by elderly foster parents who neighbors said had recently been caring for two “refugees.”

Armed police descended on the neighborhood on Saturday after the arrest of an 18-year-old man in connection with the Friday attack, in which an improvised explosive device aboard a train erupted in flames, burning some passengers and sending others fleeing in panic.

Police also arrested a second man, aged 21, late Saturday in a different suburb west of the capital.

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