JAIPUR: The barrel of a T-90 battle tank of the Indian Army exploded during a war exercise session in the Pokhran field firing range in Rajasthan 's Jaisalmer district , a defence spokesperson said Thursday.Defence spokesperson Colonel Sombit Ghosh said the incident took place on Wednesday when the barrel of the tank exploded with a huge bang.However, no loss of life was reported, he said.Colonel Ghosh said a court of inquiry has been ordered in the matter.