In a latest development in the spiralling row over 19 flights receiving bomb threats in the past 72 hours, 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.