NEW DELHI: A bomb threat email sent by unidentified persons caused a security alert at Hyderabad’s Begumpet Airport on Wednesday morning. Police confirmed that a search operation is underway, with bomb disposal teams scanning the airport and its surroundings. “Begumpet airport received a bomb threat mail this morning. We are currently conducting a thorough search of the airport and its premises with the bomb squad,” said the assistant commissioner of police, Begumpet.