'A video retweeted by Donald Trump of a Muslim migrant beating up a boy on crutches was today dismissed as fake news by police in the Netherlands.
A spokeswoman said the attacker in the video is a Dutch national - and not an immigrant as claimed by British nationalists.
The video is six months old and was filmed in Monnickendam, ten miles north of Amsterdam, they said.
A Monnickendam Police spokeswoman told MailOnline: 'The guy in the video attacking a boy on crutches is a Dutch national.'
Meanwhile respected Dutch newspaper De Telegraaf quoted sources as saying that the perpetrator is 'not a Muslim, let alone a migrant, but just a Dutchman.'
President Trump retweeted three videos that purportedly showed 'Muslims' doing bad deeds, which were initially posted by far-right Britain First deputy leader Jayda Fransen, who has been convicted of hate crimes.
Trump also posted footage of a Muslim man 'destroying a statue of Virgin Mary' – and a video apparently showing an Islamist mob pushing teenage boy off roof and beating him to death.
But MailOnline has found that despite being posted by Ms Fransen yesterday both videos are at least five years old.'