British Transport Police are looking for a man who was seen acting suspiciously at Leighton Buzzard railway station around the time of a bike theft.
At about 1.30pm on Wednesday, October 10, the man was spotted loitering around the cycle racks.
After hanging around for 30 minutes, the same man was then seen riding off on a yellow bike towards the exit road away from the station.
Officers arrived a few minutes later and found a cut cycle lock.
The man is described as white, wearing a black hooded top and blue jeans.
PC Ashley Firby said: “The owner of the bike secured the bike to the racks through both wheels and frame at 6am, with a black wire cycle lock. He returned at 5.30pm to find the bike and lock taken from the sheds.
“I would like to hear from any commuters in the area between 1.30pm and 2pm on October 10 who may be able to provide any further information, as a train had just pulled into Leighton Buzzard before the theft took place.”
The bike is bright yellow with Viking Racing along the cross tube black handle bars and has the word Viking printed all along the frame. It also has Shimano MXB pedals and a rear light under the seat.
Anyone with information is asked to contact British Transport Police on 0800 40 50 40, or text 61016, quoting reference MSUB/B4 of 23/10/14. Information can also be passed anonymously to independent charity Crimestoppers on 0800 555 111.