Social media companies scrambled on Wednesday to scrub footage of a shooting outside a German synagogue from their platforms, in the first major test of their systems since a massacre in the New Zealand city of Christchurch prompted a global outcry.

The attacker in Germany, who livestreamed his rampage on Amazon¡¯s gaming subsidiary Twitch, shot dead two people after failing to gain entry to the synagogue on Yom Kippur, the holiest day of the Jewish year.

The nearly 36-minute-long video closely resembled footage livestreamed in March in Christchurch, where the gunman also wore a camera to capture a first-person perspective as he killed 51 people at two mosques.