Reports of bicycle thefts are on the increase in Grantham, say Lincolnshire Police.
Gardens, sheds and town centre bike racks are being targeted by thieves.
Owners are advised to use a D-lock to secure their bikes, lock them under CCTV if in town, and report any suspicious activity to the non-emergency 101 number.
You can also register your bike online at www.immobilise.com to ensure that if your bike is stolen but recovered by police, it can be returned to you.