Officers are reminding riders to safely secure their bicycles when they are not in use, following a number of recent bike thefts.
In the last two weeks, there have been five reports of pedal cycles being stolen from gardens, sheds and garages in the Torfaen area.
The thefts have occurred when bikes have been left in gardens or sheds and garages that were not properly secured.
In order to help keep your bike safe you should lock it securely in your shed, garage or property.
Sheds, garages and outbuildings need to be in a good physical condition and be fitted with a good locking system to keep thieves at bay.
Also, it is a good idea to cover and shed or garage windows so thieves cannot see your belongings inside.
If you need to leave your bike when you are out and about then carry a bike chain with you and lock it to a secure object, such as a lamppost.
Detective Inspector Leanne Brustad, of Torfaen Local Policing Unit, said: “Adults and children are still using their bikes regularly at this time of year and we want to make sure that their property remains safe and secure.
“When not using your bike, please lock it with a bike chain or store it in secured property, such as a garage, to reduce the likelihood of it being stolen by opportunistic thieves or scrap metal collectors who will sell on the bike for scrap value.
“Even if you are popping into the house or shop for a short while, it’s always important to secure your property.”
If you have any information about any bicycles that have been stolen, then please contact Gwent Police on 101 or contact Crimestoppers anonymously on 0800 555111.