Bengaluru: A handwritten note threatening to hijack a Bengaluru-Lucknow-bound IndiGo flight triggered a security alert on Saturday evening, forcing the aircraft to return to Kempegowda International Airport (KIA) shortly after take-off. #bengaluru #lucknow #hijack #indigo #wion About Channel: WION The World is One News examines global issues with in-depth analysis. We provide much more than the news of the day. Our aim is to empower people to explore their world.