Three people have been left "shaken" after having a stone thrown at their van as they drove through Dundee.
Their windscreen was damaged, but the people were not injured.
Police warned the consequences "could have been much more severe".
Tayside Police is looking for witnesses to the incident, which took place shortly after 6.30pm on Tuesday.
A pair of young men were seen to throw a stone or similar object on to a white Ford Transit as it drove westwards in the outside lane of the tunnel at North Marketgait, in Dundee.
The men are described as being in their early teens, both with brown hair. One was wearing a blue hooded top and grey tracksuit bottoms, and the other had a black hooded top with grey tracksuit bottoms.
Police said the pair were on a ledge next to the flyover.
A spokesman said: "The three occupants of the vehicle were shaken but uninjured. The potential consequences could have been much more severe and any person with any information regarding this incident is requested to contact police on 03001112222.”
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