In his book Atomic Destruction in 2000 B.C. he reveals some startling findings: the objects found at the site appeared to be fused, glassified by a heat as high as 1500°C, followed by a sudden cooling. Within the city itself there appeared to be an 'epicentre' about 50 yards wide within which everything was crystallized, fused or melted, and sixty yards from the center the bricks are melted on one side indicating a blast. A. Gorbovsky in his book Riddles of Ancient History, reported the discovery of at least one human skeleton in the area with a level of radioactivity approximately 50 times greater than it should have been due to natural radiation. Davenport claimed that what was found at Mohenjo Daro corresponded exactly to what was seen at Nagasaki and Hiroshima.

https://www.sott.net/article/272836-The-Mohenjo-Daro-massacre