UK terror threat level raised to 'severe' following hospital blast

The UK's terror threat level has been raised from 'substantial' to 'severe', meaning an attack is now judged to be "highly likely".

The move, confirmed by Home Secretary Priti Patel, follows an explosion outside a hospital in Liverpool which police have declared a terror incident.

Detectives have arrested four people over the blast, which killed a passenger inside a taxi.

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