Yes. On a camping trip. At one end of the lake is the remains of an old WWII POW camp. There were at the time some small piles of coal. We took a couple of prices and burned it in a camp fire. Only because I had never seen coal burn before.

https://www.perplexity.ai/search/White-otter-Lake-lnJZ4ycdSKOAmJ2U4rZSIw?s=m

Some of those prisoners were not militants, just random civilians. Turned in by thier neighbors for a quick buck, is what happened.