Britain was shocked by a mass stabbing attack on a train Saturday evening, targeting passengers as they traveled through central England on their way to London in an incident Prime Minister Keir Starmer has described as “deeply concerning.

U.K. police said Sunday that two people remain in a life-threatening condition following a mass stabbing on a London-bound train the previous evening. Authorities added that there was "nothing to suggest" the attack was a terrorist incident.

A rail staff member is still fighting for his life and a British man remains in police custody after a knife attack unleashed horror on a London-bound train, leaving 11 injured. British Transport Police (BTP) have said there is “nothing to suggest” the rampage, thought to be one of Britain’s largest mass stabbings, is terror-related.