New Delhi: Border Security Force (BSF's) pilot Wing Commander (retd) JS Sangwan, who is facing criminal charges for impersonating his senior to fly the incumbent Union Home Minister Amit Shah's plane, has tendered resignation from the services.

Sources in the BSF said that Sangwan had filed his resignation in the first week of September which cannot be accepted as he has a pending, ongoing departmental enquiry against him. "Till the time his enquiry is pending, the decision on his resignation cannot be taken," a senior BSF official said.