Police have new powers to disperse people causing anti-social behaviour in North Mitcham and fine or imprison them if they return within 24 hours.
North Mitcham dispersal zone boundaries.
Groups of two or more people causing anti-social behaviour can be ordered by police to leave the area after a dispersal zone stretching from the southern end of Figges Marsh to Tooting was imposed.
Offenders caught returning will face up to three months' imprisonment or a fine of £2,500.
Merton Police said they introduced the dispersal zone in response to residents' complaints of persistent anti-social behaviour in their area.
The dispersal order was introduced last Saturday and will run until Sunday, February 8, 2015.