A teenager was 'struck by an unknown object', sustaining a minor injury, sparking a police investigation into the incident.
It happened on Milburn Street, Workington, at about 8:45pm on August 3.
Police suspect the occupants of a black car in the area at the time may be involved.
Anyone with information can report online at www.cumbria.police.uk/report-it - quoting incident 224 of August 3.
You can also phone on 101.
Alternatively, you can contact Crimestoppers anonymously on 0800 555 111.
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