I'm pretty new to Minecraft having only just bought the game about a week ago, so apologies if I'm missing something obvious here (I've attempted to search for the answer, but didn't find any relevant results)
I've got a private minecraft server on my home network in survival mode with
spawn-monsters disabled and normal difficulty, I've not seen any hostiles, or at least not until just now. I've just found a location in the world, deep underground, where I've found what was a fully enclosed pitch black room that was full of zombies. I got overwhelmed by them within seconds, but I did briefly notice a number of storage chests and other items within the room.
If it is relevant, I found the room by accident when I saw my first moss cobblestone. Not knowing exactly what the block was, I mined them thinking I'd found another resource, in doing so, this room was revealed.
I'm the only person that has played on the server (it's behind a firewall, and I stop and start the server on demand).
Is there any explanation for this? I didn't expect to see any hostiles at all with
spawn-monsters option disabled. I'm going to head back as soon as I get chance, but was wondering what it might be?