Three jawans were injured in a blast at the firing range at the Gorkha Rifles headquarters in Dehradun on Saturday.
The condition of one of the jawans is said to be critical. All the injured have been admitted to the Military Hospital here.
According to reports, the blast took place when a jawan got down from a truck to pick up a suspicious object lying on the ground. It is still not clear as to what actually caused the blast.
The bomb disposal squad is trying to find out about the nature of the explosive.