UK police arrested two suspects after a mass stabbing on a London-bound train late Saturday that left 10 people in hospital, nine likely with "life-threatening injuries".

British Transport Police have ruled out terrorism in a knife attack on a train Saturday night that left 11 people wounded including two who have life-threatening injuries.

"Having viewed the CCTV from the train, the actions of the member of rail staff were nothing short of heroic and undoubtedly saved people's lives," BTP's statement said.