A 13-year-old boy has been arrested on suspicion of attempted murder, as Metropolitan Police said the investigation into the stabbing of two other boys, aged 12 and 13, at a school, was being led by counter terrorism police.Press conference with Detective Chief Superintendent Luke Williams.

A 13-year-old boy has been arrested on suspicion of attempted murder, as Metropolitan Police said the investigation into the stabbing of two other boys, aged 12 and 13, at a school, was being led by counter terrorism police.Press conference with Detective Chief Superintendent Luke Williams.