Acting Deputy Commissioner Mark Rowley appealed for the public’s help. He said:

We named the dead terrorist as Khalid Masood, and as I said, our investigation focuses on understanding his motivation, preparation and his associates.

Whilst there is no evidence of further threats you will understand our determination to find out if he either: 

- Acted totally alone inspired by terrorist propaganda;
- Or, if others have encouraged, supported or directed him;

At this point I want to appeal specifically to the public.

We remain keen to hear from anyone who knew Khalid Masood well; understands who his associates were; and can provide us with information about places he has recently visited 

There might well be people out there who did have concerns about Masood but weren't sure or didn't feel comfortable for whatever reason in passing information to us.

I urge anyone with such information to contact us the Anti-Terrorist hotline which is 0800 789 321.


Information and updates

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Appeal for images and footage

If you have photos or film of the incident in Westminster please make sure you pass them on to the police.

Report anything suspicious

Please report anything suspicious to the Anti-Terrorist Hotline 0800 789 321 or online.

In an emergency call 999.