Allegations of nails being deliberately scattered at the back of an Oamaru service station, damaging vehicle tyres, is a serious matter that jeopardises public safety, police say.
Jesse Noordermeer posted a photograph on social media on Friday that showed what appeared to be a Z-nail embedded in a friend's car tyre.
The friend found the nail after driving down the accessway of the Caltex station in State Highway 1 in north Oamaru, owned by the Oamaru-based McKeown Group.
The owner, who did not want to be named, did not report it to police, but Sergeant Blair Wilkinson, of Oamaru, said they were aware of similar incidents.
The driver was alerted to the nail by a "rattling" sound.