The incident occurred on Sunday night when the barrel of a 81-mm mortar exploded when the troops were firing at the range, about 40 km from here, army sources said on Monday.
The injured were rushed to Jodhpur Military Hospital soon after the incident, they said.
Vasanada belonged to the Maratha regiment in New Delhi. His mortal remains are expected to reach his hometown on March 17. Of the deceased, three jawans belonged to the 9 Maratha Light Infantry Unit and one was from the Jammu and Kashmir Light Infantry.
The army has ordered a probe into the accident, officials said in New Delhi. In March 2008, three army personnel were killed and two others injured during the “Brazen Chariots” exercise in the same field firing range.