IndiGo, Air India bomb threats trigger high alert at major airports including Mumbai, Delhi, Kolkata — What we know  livemint.comBomb scare: Threat mail sent to Delhi’s IGIA, 4 other airports named; AI Express flight evacuated  The Times of IndiaBomb scare on Air India Express flight, IndiGo gets security threat for 5 airports  India TodayBomb threat email names Hyderabad airport; declared hoax  The HinduVaranasi-Bound Air India Express Flight Receives Bomb Threat. It Was A Hoax  NDTV  Read More