Detectives have made a second arrest as part of their investigation into the unofficial gathering of motorcycles and quad bikes - which chaos on Halloween in Leeds.
Hundreds of calls were received by West Yorkshire Police on Monday as a group of up to 50 riders descended on the A65 Kirkstall Road, forcing its closure for around an hour.
No arrests were made during the incident, but a 26-year-old Leeds man was arrested by police on Tuesday and has since been bailed.
And today police said a 30-year-old man was arrested and a vehicle has been seized.
The group of riders had also been seen speeding en masse through other parts of the city centre and the Hyde Park area on Monday.
Detective Sergeant Mark Atkinson, of Leeds District CID, said: "This incident caused an understandably high level of public concern and we are continuing to progress our enquiries and expect to make further arrests.
"We would also like to reiterate our warning to people to think very carefully about the consequences of taking part in unofficial gatherings like this that cause disruption and threaten public safety."
Anyone with information about the incident is asked to call police on 101.