Police have released images of 12 people they want to identify in relation to the disorder which erupted at the Million Mask March in central London.
The 5 November demonstration, promoted by hacktavist group Anonymous, encouraged protesters to gather at Trafalgar Square to wear Guy Fawkes masks in order to "shed light on corrupt government in order to set people free from oppression".
Police said while a majority of the demonstrators were peaceful, there were a few "pockets of violence" shown towards officers.
Police have now released images of 12 people they wish to find in connection to violent disorder which took place in Parliament Square on the night of the march, which included objects such as traffic cones and barriers being hurled at police.
Detective Chief Inspector Andy Barnes, from the Met's Public Order Command, said: "This was a concerted violent attack on officers by a minority who were determined to commit crime and had no interest in peaceful protest.
"This type of behaviour will not be tolerated and we will make every effort to trace these individuals and hold them accountable for their actions. I would appeal for help from the public in identifying these individuals so they can be brought to justice."
A total of 10 people were arrested following the disorder in London, including assaulting a police officer, obstruction offences, attempted GBH, and public order offences.
The Million Mask March also took place in several other cities around the world, including Auckland, New York and Belfast.
Anonymous described the worldwide event as "the largest world protest by the most influential group in the world".