Two arrested after crowds flood high street in social media craze

Two teenage girls have been arrested for assault after crowds flooded a London high street as part of a social media 'link-up'.

Police were called to Clapham, south London, following reports of anti-social behaviour involving large groups of young people, who gathered after a series of online posts about meeting in the area. Footage showed people spilling into the road, blocking cars and buses, while others congregated on the pavement outside a McDonald's.

Pictures captured police vehicles reaching the scene as traffic came to a stop due to the numbers of pedestrians in the street. In other clips, groups of people could be seen running down the road as officers in marked and unmarked cars arrived.

The online 'link-up' trend sees groups posting on social media, calling for as many people as possible to gather in a specific location. It is not clear how many people were involved in Tuesday evening's unrest.

Scotland Yard confirmed two teenage girls were arrested on suspicion of assaulting an emergency worker. Police also imposed a "dispersal order.