Nine people were treated for life-threatening injuries after a series of stabbings on a train near Cambridge in eastern England on Saturday, and two men were arrested in what Prime Minister Keir Starmer called an “appalling incident.”

British Transport Police said counterterrorism police were supporting its investigation whilst it works to establish the full circumstances and motivation for the incident.

“We’re conducting urgent enquiries to establish what has happened, and it could take some time before we are in a position to confirm anything further,” British Transport Police Chief Superintendent Chris Casey said.

“At this early stage it would not be appropriate to speculate on the causes of the incident.”

Cambridgeshire police said they were called at 1939 GMT after reports that mu

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