The fire-explosions killed 16 persons - 13 fire brigade personnel, two Army officers and one jawan.
"Seven of them were blown to pieces and their body parts were later recovered from the site. The impact of the fire and explosions was so severe that these victims were thrown in the air and landed in pieces," a top police official told PTI on the condition of anonymity.
He said all the 16 victims were dead on the spot.
Loud explosions were heard one after the other and raging fire lit up the night sky at Pulgaon in Wardha district.
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The police official said it was for the first time in the history of this depot that such fatalities has occurred.
On two occasions in the past, major fires were recorded -- in 1980 and 2004. However, there was no loss of life.
"17 persons are undergoing treatment at the hospital. Out of them, three were operated for minor injuries. Four others were surgically operated. While one person was admitted with severe burn injuries, another one with neuro injuries," Dr Sandeep Shrivastava, dean of the college and hospital said.
Deputy Commandant of the central ammunition depot, Col Gajendra Singh, is among the injured and he is out of danger, Shrivastava added.
Most of the patients complained of injuries in ear drums. Some of them sustained burn wounds, while some others were injured due to flying splinters after explosions, he said.