For latest updates on the incident that took place in Finsbury Park you can read more on the Metropolitan Police website.
You can follow @Terrorism Police UK and @MetPoliceUK for Twitter updates on the incident.
Useful information that may assist when deploying the tactical options:
Find out more about the Action Counters Terrorism campaign.
If you see anything that causes you concern or raises your suspicions do not hesitate to call the Police on 0800 789 321 or in an emergency 999. If you get caught up in the rare event of a weapons attack we urge you to follow the Run, Hide, Tell advice.