The Metropolitan Police arrested a man in his 20s and a 15-year-old boy in Central East London at around 6.45pm on Sunday (March 1).
They were arrested on suspicion of encouraging or assisting in a crime, and both remain in police custody.
Police said the arrests relate to a recent trend of social media posts which encouraged pupils to engage in violence against each other.
The wider “Red vs Blue” trend saw posts on TikTok and Snapchat frame after-school meet-ups as confrontations between rival schools, dividing pupils into colour-coded teams.
Some circulating posts referenced bringing items such as compasses and metal combs, prompting warnings from schools and increased patrols across several boroughs.
In some areas, parents were advised to collect children directly from school gates as a precaution, and Section 35 dispersal orders were put in place.
Police have not confirmed whether further arrests are expected.
A spokesperson for the Metropolitan Police said: ‘On Sunday, 1 March at approximately 18:45hrs, Met officers arrested two individuals in Central East London in connection with a recent trend of social media posts.
“Both suspects, a man aged in his 20s and a boy aged 15, were arrested on suspicion of encouraging or assisting in a crime.
“They remain in police custody.
“A strong police presence remains around schools, particularly at the end of the school day.
“Local officers continue to work alongside local authority partners, school leaders and parents, whose joint robust response has been vital in protecting young people across the last week.”
