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The threatening messages reached the airlines' 'X' (formerly Twitter) accounts hours after both flights had departed.
According to PTI, over 90 flights have received bomb threats this week.
Cochin International Airport (CIAL) conducted a bomb threat assessment after a social media post targetted Alliance flight 9I 506 COK-BLR.
After authorities were alerted about the bomb threat, an emergency was declared at the Jaipur airport.
Officials said at least 19 hoax bomb threats were issued to domestic and international flights in Indian over the last three days.
The aircraft is currently stationed at the Indira Gandhi International Airport.
Authorities suspect that one of the passengers wrote the message.
Man handed over to local police for further investigation.
Aviation security plays a major role in ensuring the safety of the passengers, crew and staff members.
Injured people were booked under provisions of KAAPA earlier.