Police are asking cyclists to take extra care with their bikes after a spate of thefts from Hebden Bridge railway station.
British Transport Police say seven bicycles were stolen from the station last month,
Two people have been arrested in connection with the thefts and officers have stepped up patrols in the area.
The police say there are simple measures cyclists can take to help ensure their bike is safely locked and so not encourage the attention of thieves.
Sergeant Rudy Tanghe said: “Unfortunately cycles remain a popular target for thieves and railway stations are often targeted.
“Our officers have conducted a cycle crime awareness surgery at the station this week to provide crime prevention advice and cycle tagging to passengers and we are also working closely with cycle and second hand shops in the area to make it more difficult for thieves to sell on stolen property.
“Lock your bike whenever you leave it, preferably with two good quality locks to secure the frame and wheels, and wherever possible leave your bike in a busy, well-lit area which is covered by CCTV.
“Please also ensure that your cycle has been property marked and fitted with an electronic tracing system or tag to help locate the cycle in the event of a theft.
“Make sure your cycle is insured, keep a photograph of it and note the frame number and any markings which will help police to identify any stolen bikes that are recovered.
“We will continue to work closely with Network Rail and the train operating companies to tackle cycle crime and passengers should report anyone acting suspiciously around cycle racks at railway stations to British Transport Police straight away.
“We would also like to encourage any members of the public who are offered a bike in suspicious circumstances to contact us”.
If you have any information about those responsible for the thefts call British Transport Police on 0800 405040 or Crimestoppers on 0800 555111.