Mysterious Package

I got a package today, left on my doorstep. It's addressed to my apartment, but not to me. Or to any name I've ever used, or anything that could possibly be a typo based on any name I've ever used. Also, to a name not in the phone book and not findable online anywhere. So I have no idea what to do with it.

I tried knocking on neighbors doors but the first couple I tried looked at me like I was crazy, especially since it wasn't actually addressed to them. So I stopped that real fast.

I guess I'll try to give it back to the apartment manager tomorrow? For now I'm leaving it in the hallway and pretending it doesn't exist.

It's probably full of nerve gas anyway.