I parked the bike with the U-lock (the front wheel and the frame to a bike parking) and I went into a building for an event at 18:25. When I came back to pick de bike at about 21h the bike was not there any more.
Protect your bike – get a security protection label!
Apply the protection label to your bicycle and instantly reduce the risk of theft by up to 50%! Moreover, if the bike is stolen, you increase the chance of its safe recovery by up to 70%.