Scotland Yard Police scuffled with several pro-cycling activists during a protest by cyclists during the eve of Olympics opening ceremony, on Saturday.
The incident occurred on the outskirts to the Olympic Park on one of the main throughfares to the venue.
Police used pepper spray against the dozens of cyclists were blocked by police vans from proceeding, Scotland Yard said. No serious injuries were reported.
The cyclists are believed to be part of a 'Critical Mass' cycling club that arrange monthly bike rides, but a police order meant the cyclists were prohibited from travelling into the Olympic Park on Friday night.
The Metropolitan Police have confirmed that more than a 100 people were arrested outside the Olympic Park last night following cycling protests.
While there is little information available yet, the following tweets were seen on the London Metropolitan twitter page: