The Swiss federal railway police have confirmed a stabbing attack at a major station, leaving three injured. The assailant is reportedly still at large. This incident, still very much unfolding, will send a fresh shiver through European security circles.
The continent is on edge. The timing is awkward for the Swiss, who pride themselves on being a stable hub. Expect questions about border controls and intelligence sharing.
Inside the Home Office, officials will be watching closely. Any hint of a terror link will accelerate already sensitive discussions about hardening targets across the UK. The usual platitudes about 'random acts of violence' may not hold.
The station has been sealed. Witnesses describe scenes of panic. Details are scarce.
But the political ripples will be immediate. Europe's security architecture, already creaking under migration pressures, faces another test.
