One Border Security Force (BSF) trooper was killed on Friday while three others injured when a bomb exploded prematurely during an exercise in Jaisalmer district of Rajasthan, an official said.
The accident happened around 1.30 p.m. during an exercise being conducted in Kishangarh field firing range in Jaisalmer, about 650 km from here, BSF Deputy Inspector General Ravi Gandhi told IANS by phone.
"The injured have been brought to hospital in Jodhpur by an air force helicopter," he said.
