Police force orders internal review into events before mass stabbing on London-bound train

A forensic investigator photographing inside the train at Huntingdon train station in Cambridgeshire, after a number of people were stabbed on the train on Saturday (Joe Giddens/PA)

A police force has commissioned an internal review into events in the lead-up to a mass stabbing on a high-speed train service.

Cambridgeshire Police previously said the stabbing of a 14-year-old boy the day before and two reports of a knifeman seen at a barber’s in Peterborough were being investigated.