India, Feb. 12 -- The Crime Branch of Ahmedabad Police on Wednesday said it expected to make a breakthrough in its probe into the two bomb threats against international IndiGo Airlines flights at Sardar Vallabhbhai Patel International Airport on November 11 and February 10.

"Both the threats turned out to be a hoax. The recent threat is estimated to have cost the airlines about Rs.50-60 lakhs. We are investigating the angle of it being an inside job. It could be some disgruntled person working for the airlines," said an official aware of the matter.

Bharat Patel, assistant commissioner of police (ACP) Crime Branch, said the crime branch had taken up investigation into both cases given the seriousness of the cases.

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