Food safety regulator FSSAI has issued a show cause notice to IndiGo for serving unsafe food to a traveller. This comes days after a worm was found in a sandwich served onboard a flight. On January 3, the airline said it had received the show cause notice, reported PTI. The incident took place on December 29 onboard flight 6E 6107 from Delhi to Mumbai. The passenger had shared the video on social media. The airline had apologised. The airline has been given seven days to respond to the notice issued by FSSAI. Watch the video to know more.