Counter-terrorism police are involved in an investigation into a mass stabbing on a train which left nine people suffering with life-threatening injuries.A man with a large knife is believed to have been shot with a Taser by police after going on a bloody rampage on a high speed train after it left Peterborough station in Cambridgeshire.British Transport Police (BTP) said two people have been arrested over the stabbings which happened on the 6.25pm train service from Doncaster to London King's C

Counter-terrorism police are involved in an investigation into a mass stabbing on a train which left nine people suffering with life-threatening injuries.A man with a large knife is believed to have been shot with a Taser by police after going on a bloody rampage on a high speed train after it left Peterborough station in Cambridgeshire.British Transport Police (BTP) said two people have been arrested over the stabbings which happened on the 6.25pm train service from Doncaster to London King's Cross on Saturday.