A washing line strung across the Bristol to Bath cycle path at wheel height caused a man to be flung from his bike on Monday evening.
The 28-year-old man, a soldier who has been serving in Afghanistan, was knocked unconscious by the fall at around 8pm, with a passer-by coming to his aid 20 minutes later. However, his blue and black Trek Madone, a bike he uses for racing, had been stolen. He was checked over by paramedics but did not require further treatment.
Anyone with any information which could help police with their enquiries should contact South Gloucestershire CID on 101, the new non-emergency number, or call the independent Crimestoppers charity on 0800 555 111.