IndiGo Airlines confirmed the incident occurred at Chennai Airport about 1930 hours during Secondary Ladder Point Security (SLPC) of the Indigo flight 6E-582 from Cochin to Bhubaneswar.
A co-passenger saw the 22-year-old texting about a terrorist being on the plane which was headed to Mumbai
One high-speed train destined for Madrid and another for Paris were evacuated during the security operation in Barcelona.
The "bomb-like" substance was detected by an on-duty keyman of Eastern Railway near the down line between the terminal station Sealdah and Park Circus.
While briefing the media persons over the development, UP DGP OP Singh said that the youth had bought bitcoins worth $1,000, which had tripled over a short period of time.
Five gas cylinders were found in a car, police said, while playing down the likelihood of it being terrorist-related.