On Thursday, two aircraft of IndiGo, airlines escaped from mid-air collision at the border airspace of India and Bangladesh, said information given by the AAI officials.

Only 45 Seconds were left before the possible collision, as one aircraft changed its direction to the right after receiving the information from the Air Traffic Control (ATC) tower in Kolkata. The ATC instructed one of the aircraft to turn right as the other aircraft was also flying at the same altitude on Wednesday.

Both the aircraft were of Indigo Airlines and both of them were flying at the same level of altitude on Wednesday evening which increased the chances of the mid-air collision between both the aircraft, said a senior AAI official at the Kolkata airport in a statement.

He added that one of the aircraft was flying from Chennai to Guwahati and the other was heading towards Kolkata from Guwahati. The incident took place when two aircraft came close to each other at around 5:10 pm. At the specific given time, the one aircraft was at the altitude of 36,000 ft in Bangladesh airspace and the other aircraft was at an altitude of 35,000 ft in Indian airspace.

The official said that the Air traffic control of Bangladesh asked the aircraft flying towards Kolkata to descend to 35,000 ft and as soon as aircraft made the descend to 35,000 ft, it came close to the aircraft which was already flying at the height 35,000 ft.

After one of the ATC officials in Kolkata saw it he instantly instructed the Chennai-Guwahati plane to move towards the right and away from the path of the other descending aircraft, avoiding a mid-air collision between both the aircraft said, official.

When asked about the Indigo spokesperson, he said he was not aware of any such information. Another AAI official said that according to the standard procedure, a proper investigation will be instigated.

The official also stated that we will found out later after an investigation that the Airborne Collision Avoidance System (ACAS) or the Traffic Alert and Collision Avoidance System (TCAS), which are usually fitted inside the aircraft, had alerted the captains of the aircraft or not.