Wall of casemate jf central part of the fort

Molten bricks. Here they probably burned pirogels or napalm or something else containing phosphorus. There are reports that it was diesel fuel and fuel. I don’t agree, where they were burned - the smell (or rather, the shmon) still lingers, but here it doesn’t exist, and besides, to get such an effect, you need a temperature of over 2000ºC...