Two male police officers are being treated in hospital after they were stabbed by a man with a knife near Leicester Square in central London.
The Met Police have confirmed a Taser was used during the incident at 6am and a man was arrested on suspicion of grievous bodily harm and assaulting an emergency worker.
The condition of the two officers is not known and their families are aware of the incident, which is not being treated as terror-related.
The man arrested was taken to a hospital for treatment where he remains at this time.