Thames Valley Police has issued a warning following reports of individuals riding pit bikes and mopeds without helmets in Didcot.
Police say the individuals are riding on farm land and footpaths in the area and that officers are "actively patrolling" the locations of the reports.
A statement from the Thames Valley Police south Oxon and Vale of White Horse branch said: "Didcot Neighbourhood Policing Team has received reports from the community regarding individuals, without helmets, riding pit bikes and mopeds on farm land and footpaths in the area.
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"Officers have attended locations of these reports and are actively patrolling locations that have been brought to their attention.
"If you witness this behaviour, please call 999 and refer to the attached image of what information the police will need to help identify those putting themselves and others in danger.
"Alternatively, if you are reporting an incident that has happened already, feel free to use the same template in an online webform or when calling 101."
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