A 45-year-old Chennai resident, Sharath Subramanyam, has been arrested for allegedly making bomb threat calls to Rajiv Gandhi International Airport at Shamshabad. Police brought him to Shamshabad for questioning and are investigating the motive behind the calls. Hyderabad: A 45-year-old man from Chennai has been arrested for allegedly making bomb threat calls to the Rajiv Gandhi International Airport at Shamshabad.