Incident just occurred in the southwest lower staircases of 6616 N. Ashland, off the back alleyway. Two bicycles were secured by three separate locks attached to the wood beams of the southwest backstairs. I only happen to notice two of my tires, still locked together, laid on the pile of wood planks. Upon further inspection I found that one of the bicycle frames had been stolen, while the other was on the concrete landing of the building next to ours. The thief(s) were able to remove the bikes by cutting through the master wire lock which attached the bikes to the pole. They were unable to remove the two kryptonite locks which connected the bikes by wheels and the frame of the remaining bike. I can only guess that they were interrupted, or I would be writing you about the theft of both my bikes. I'm trying to be as descriptive as possible so that others can benefit from our loss. Other bikes are also locked up in same area. Just in case, the stolen item is a blue "Specialized' mountain bike with only the handlebars, seat and frame remaining. I can be reached at 773-562-5306 if you have any questions or information.