British police report huge rise in terror probes

"We are disrupting several attack plots a year."
Police arrested several people this month in what they said was a "significant" plot.
Britain raised its terror threat level to "severe" from "moderate" in August, and the government has expressed concern that British-born jihadists who have travelled to Iraq and Syria could pose a threat if they return.
Rowley said that extremist groups are using social media in increasingly sophisticated ways, and that police remove over 1,000 pieces of extremist material from the internet each week.
"The growing problem of young, impressionable, and in some cases vulnerable, individuals being radicalised online is an increasing risk," Rowley said.
Much of the material relates to Iraq and Syria and some relates to beheadings, suicide and torture, Rowley said.
In all, 66 people have been reported missing to police are feared to have travelled to Syria, according to the police chief.
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