London (CNN) Following a threat of legal action, British far-right activist Tommy Robinson has backed down from accusations he made against a Syrian schoolboy who was attacked in an incident shared widely on social media.

Earlier this week, footage emerged showing the 15-year-old -- a refugee from Syria -- being taunted, grabbed by the throat and pushed to the ground, as other students at Almondbury Community School in Huddersfield, northern England, looked on.

Robinson made allegations against the teenager Wednesday and Thursday in a number of Facebook and YouTube videos. By Friday, he had deleted the videos and admitted to posting a fake photograph purporting to show violence by a Muslim gang.

The videos were deleted after the lawyer for the boy's family, Mohammed Akunjee, said his clients planned to sue the far-right agitator.

Letter for Mr Tommy Robinson (AKA Stephen Yaxley-Lennon) pic.twitter.com/Ef97uHpnT7 — Mohammed T Akunjee (@MohammedAkunjee) November 29, 2018

In a letter uploaded to Twitter on Thursday, Akunjee described Robinson's claims as "false and defamatory allegations" and asked for the videos to be "removed immediately."

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