Politicians, youth leaders and those affected by violence have been meeting at a conference in London aimed at tackling gang culture.
As Liz Wickham found, it's thought the arrest of more than 200 gang leaders in the wake of the 2011 riots may have created a power vacuum, in which younger gang members have grabbed power, on a wave of violence:
Leading MPs will be calling on the Governement today to make changes to policies regarding youth gang culture.
The conference, Tackling Gang Culture, will look at whether Government strategy to remove gang leaders following the 2011 riots was counter-productive. It's thought it may have created a power vacuum in which younger gang members grabbed power on a wave of violence.