Bicycle was inside a locked porch on the second floor of an apartment building. Locked door downstairs was forced open, and bicycle was only item taken. Thief would have had to have entered from the front of the building, gone through the gangway, opened the door, come upstairs, stolen the bike and brought it back downstairs - no easy feat, considering how heavy the bicycle is with the rack, baskets, and fenders, the passage is fairly narrow, and there are a number of boxes on the porch. Also, from ground level, no one would know that this door leads up to the porch. It also stormed that night, which makes it an even stranger occurrence. I had been moving things in the porch until after 11:30pm the night before, and when I went to get the bike in the morning, it was gone, and the door to the porch had been left open.