In the latest development in the series of threats to airlines, over 20 flights receiving bomb threats over 72 hours, in connection with which Mumbai Police took into custody a 17-year-old boy on Wednesday. As per media reports, the 17-year-old school dropout hails from Chhattisgarh's Rajnandgaon. While the boy has been taken into custody his father, who was summoned by the Mumbai Police on Tuesday, is still being questioned.