How do I get rid of some bullets?

Someone moves out of my house. He leaves some stuff behind that he isn’t going to come back for. The items include some bullets.

I’m told that I can’t just throw them in the trash because they’re explosive.

I don’t want to turn them in to any office or agency that’s going to be unpleasantly interested in where they came from. I just want them removed from my premises without endangering anyone.

What do I do?

To the best of my knowledge, there’s no gun in this picture. I don’t know why there are bullets.