UK police said they had arrested two suspects Saturday as “a number of people” were taken to hospital and a “large-scale” emergency response was mobilised after a stabbing on a train near Cambridge in eastern England.

“We are currently responding to an incident on a train to Huntingdon where multiple people have been stabbed,” British Transport Police said on social media, adding that “two people have been arrested”.

Cambridgeshire police said: “A number of people have been taken to hospital.”

A witness described seeing a man with a large knife and told The Times newspaper there was “blood everywhere” as people hid in the washrooms.

Some passengers were getting “stamped [on] by others” as they tried to run, and the witness told The Times they “heard some people shouting we love [you]”.

UK Prime Minister Keir Starmer said the “appalling” incident was “deeply concerning”.