Counter-terrorism police are seeing a rapid increase in the number of suspects fascinated with extreme violence, whose search histories are like "a pick and mix of horror", a senior officer has said.Metropolitan Police Deputy Assistant Commissioner Vicki Evans, who is senior national co-ordinator for counter-terrorism policing, said the youngest people in their caseload are children of 10 or 11.

Counter-terrorism police are seeing a rapid increase in the number of suspects fascinated with extreme violence, whose search histories are like "a pick and mix of horror", a senior officer has said.Metropolitan Police Deputy Assistant Commissioner Vicki Evans, who is senior national co-ordinator for counter-terrorism policing, said the youngest people in their caseload are children of 10 or 11.