Lincolnshire Police have put out the second bicycle theft warning in under a month, after another spate of thefts from sheds and gardens in the city.
Several bikes were stolen in the past few weeks from sheds and gardens in various locations in the city, including Gunby Avenue, Rookery Lane and Church Drive.
This comes after police said last month that 69 bicycles were stolen in Lincoln since the beginning of August, despite three arrests and increased police activity.
Police believe both men and women are stealing the bikes and it is taking place at all times of the day and night.
Other hotspots in the city seem to be Upper High Street, The Maze and St Catherine’s.
Police also recover regularly a large number of bicycles, but say they often cannot be returned to their owners as some victims can’t even remember the make of the bike.
Bike owners are now being urged to record their serial numbers, model details and a description, or local beat officers can help them with UV marking.
Residents are also being urged to improve their shed security by investing in better locks and alarms.
Owners of very expensive bikes should consider keeping them inside their homes, where they are much more secure.