I honestly don't know. I was nearly asleep when I heard the first one. Just a bang. The second one was more like something falling. I've now got half the lights on in the house, and am back in my bedroom.
Actually I'm a bit edgy cos I've gone to bed but heard bangs twice. Bit anxious. Bout half an hour in between them, quite loud. I've pit the lights on. There doesn't seem to be anyone about.