By Michael Holden LONDON (Reuters) - More than 700 Britons are thought to have traveled to Syria and over a half have since returned home where they **w pose a significant terrorism threat, British Police said on Thursday. Mark Rowley, the lead ******r on counter-terrorism, also said there had been a record 338 arrests for terrorism-related offences last year, up by a third from 2013, with almost a half related to the conflict in Syria. Rowley said of the 700 Britons who were believed to have gone, "a significant proportion" were thought to have tried to join Islamic State (IS) militants who have taken over swathes of Syria and Iraq.
05-15-2015, 10:20 AM
Police say over 700 Britons have traveled to Syria, half **w home
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