Court orders which restrict the movements of people accused of being in gangs can be used by police and local authorities from today.
Gang injunctions are designed to break down gang culture by imposing prohibitions and requirements.
These could include being barred from:
entering a certain geographical area
being in public with a particular species of animal, for example a dog which had previously been used as a weapon
wearing certain 'gang colours' in public
Individuals will also be required to participate in positive activities such as being mentored.
The powers apply in England and Wales only.
Minister for crime prevention James Brokenshire said: 'Gangs cause significant and lasting harm to our communities through fuelling violence, creating an atmosphere of fear and drawing young people into criminality.
'These new powers will help police and local authorities tackle local gang problems by placing tough conditions on the behaviour of individuals involved in gang-related violence and providing strong support to those who want to leave violent gangs.'
This week the Home Secretary will unveil a raft of plans to tackle crime, empower local communities and to hold police forces to account.