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."
Fliers have expressed their displeasure with the sudden development on Twitter.
Pathetic response @jetairways I experienced problem of congestion at entry gate since 2.15 pm. Your tweet comes after 4.20 pm??— Vinod Verma (@vinod191248) September 10, 2017
A member of an airline, who wished to remain anonymous stated the airport was closed due to a mock drill rehearsal that was being carried out.
Passengers were inconvenienced by the massive flight delays and those who boarded were required to undergo security checks again.
In March this year, a similar mock drill was conducted at the Chhatrapati Shivaji International Airport (CSIA), which ended in failure. It exposed loopholes in the emergency response system, with the preliminary report mentioning that eight of the total 170 (dummy) passengers died during the drill.
(This story has not been edited by NDTV staff and is auto-generated from a syndicated feed.)