Police are seeking to identify those responsible for a string of graffiti incidents across Canberra.

The graffiti consists of images of a dinosaur, often accompanied by a heart and messages, and has been seen in suburbs including Dickson, Lyneham, Kaleen, Lawson, Bruce, Fyshwick and the City.

Police say the offenders have defaced traffic signs, bus stops, fences, overpasses, traffic lights, shops, sporting sheds and bike paths.

Anyone with information that could help police is being urged to contact Crime Stoppers on 1800 333 000.