Following the incident, which happened when the aircraft was yet to take off, the "unruly passenger" was offloaded and later taken to police station by the airline staff. He was let off after questioning.
"Following standard operating procedures the captain operating 6E-395 flight from Mumbai to Kolkata (September 24, 2018) had initiated the offloading of the passenger on grounds of security violation," the spokesperson said in a statement.
Passengers are prohibited from entering the cockpit of a commercial flight.
An officer at airport police station here said the person, who was around 35 years old, was taken to police station but was later let off after questioning.