Bicycle detail

Bike was locked with Ulock through back wheel and frame onto a street sign pole. It's a new style pole that allows the city to repair it if a car hits it, etc. It's a square and has holes for bolts. They stick the pole w sign into the piece in the concrete and bolt it in good. I locked it there in front of the bike shop Bicycle Stable on Frankford Ave and Belgrade in Fishtown Philadelphia between 930pm and 3am and when I went to retrieve it, the sign was pulled up and layed on the ground. So they cut the bolts, lifted the pole and layed it down and took off with the bike. ULock either on or not at the time they left is unknown but no sign of Ulock at the scene or around it.