A number of protesters plan to "provoke disorder" at a vigil for Mark Duggan in London today, Scotland Yard has warned.
The Metropolitan Police have said that extra officers are on standby to respond to trouble and will be able to take immediate action.
The 29-year-old's relatives and supporters are set to gather outside Tottenham Police Station in north London from 2pm and have appealed for the event to remain peaceful.
The vigil will take place in protest against what his family have branded a "perverse" inquest finding that he was lawfully killed by police.
His death at the hands of a Metropolitan Police marksman sparked riots across the country in 2011.
The statement said: "Today is a busy day in the Capital and we have a policing operation in place across London.
"This includes having additional officers on standby that could respond to any incident that occurs.
"Part of this operation includes assessing all available information and intelligence, and we are aware of a limited amount of information that indicates a small number of people are expressing their desire to use this vigil as an opportunity.
"This information includes the intention of protest groups to attend and of people looking to provoke disorder. We will be ready to intervene immediately if required."
The statement added: "The family has expressed that they wish this vigil to be held in a dignified and peaceful manner.
"The MPS has met with the organiser to ensure that we can appropriately facilitate their plans."