TalkTalk breach investigation leads to fourth arrest

Police investigating the data breach at U.K. telecommunications operator TalkTalk made their fourth arrest late Tuesday, as lawmakers launched their own inquiry into the case.The Metropolitan Police Cyber Crime Unit and the National Crime Agency arrested a 16-year-old boy at an address in Norwich, England, after visiting it with a search warrant.Police had previously arrested a 15-year-old boy from County Antrim, Northern Ireland, on Oct. 26, a 16-year-old boy in Feltham, England, on Oct. 29, an