He said the incident happened during a "demolition" firing in Pokharan by the jawans of 14 engineering regiment.
The exercise to destroy faulty ammunition is referred to as "demolition firing".
All the injured have been evacuated by air to a military hospital in Jodhpur.
An inquiry has been ordered to ascertain the cause of accident, the official said.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)