Two men - both believed to be drunk - have been arrested after drinking liquor on board a Delhi-Patna IndiGo flight on Sunday night. The two men - identified only as Rohit and Nitish - were arrested based on a written complaint by the domestic airline, an official at the Patna Airport Police Station told news agency ANI. According to sources, the two were stopped by crew members after consuming alcohol, and that they had apologised in writing.

Sources also said IndiGo had informed Air Traffic Control (ATC) before landing that the two were carrying liquor; the airline filed the official complaint after landing.

Initial reports of a ruckus on board the plane are not true, the sources also said.

Meanwhile, IndiGo in a statement on Twitter said that the matter is under investigation with the authorities.

“With reference to the incident that took place onboard 6E 6383 from Delhi to Patna, the matter is under investigation with the authorities. We would like to clarify that there was no altercation onboard the aircraft, as what is being reported in some sections of social media,” the airline wrote.