Southwark Police want to hear from anyone who saw a group of youths on mountain bikes in the Blackfriars Road area on Wednesday night.
Lambeth Council and the police will reintroduce the Waterloo dispersal zone following a sharp decline in the number of rough sleepers and street drinkers in the area over the past six months.
A 16-year-old boy is in a serious condition in an east London hospital after he was found stabbed near the junction of Blackfriars Road and Ufford Street on Wednesday night.
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