Are they allowed to take my bike?

I usually park my moped by the fence. The owner of the building is fine with me parking it there. But today at 5am the police broke the chain and just took my moped. My moped is all registered and has its plate

I usually park my moped by the fence. The owner of the building is fine with me parking it there. But today at 5am the police broke the chain and just took my moped. My moped is all registered and has its plate