Mumbai airport's Terminal 2

In the event of a sudden mock evacuation drill at the Mumbai airport on Sunday, departure flights were delayed up to 50 minutes till 8:00 pm. This was confirmed by Jet Airways in an official tweet.

The tweet on Jet Airways official Twitter account read, "#9Wupdate: Due to mock evacuation drill at #Mumbai airport, departure delays of up to 50 mins are expected at Mumbai till 2000 hrs."

#9Wupdate: Due to mock evacuation drill at #Mumbai airport, departure delays of up to 50 mins are expected at Mumbai till 2000 hrs.

— Jet Airways (@jetairways) September 10, 2017

Fliers have expressed their displeasure with the sudden development on Twitter.