Did the same mistake first. But never found any, mabye one of the boxes you stumble upon in the first camp?
But on a side not, would be nice if you could move it, Now what I do is IF i accidently put a explosive, often in spawn on like Domination servers, I often choose to re-spawn so I don't have the "touch off alternative" so there is not chance of it going off, but it still stays there active.