About 2,200 people watched a gunman's video of his attack outside a synagogue in Germany before it was removed from video-streaming site Twitch...

The company said the account that live-streamed the attack had been created two months before the incident. It had only attempted to live-stream once before.

Twitch said it had shared a "hash" of the video with a group of tech companies including Microsoft and Facebook.

A video hash is essentially a "fingerprint" of a video that helps platforms detect if the same footage has been uploaded on their service...

In March, an attack on a New Zealand mosque in which 51 people were killed was live-streamed on Facebook.

The social network was criticised for failing to prevent copies of videos of the Christchurch mosque shootings from being shared on its platform.

Facebook has since discussed plans to train algorithms to recognise videos of shootings so they can be detected and removed more quickly...