[N19PEDL2]

According to the International Civil Aviation Organization, parallel simultaneous takeoffs are allowed only when the distance between the runways is at least 760 m, a suitable radar is available and the flight paths diverge at least by 15° after departure.[0] Probably at least one of these requisites was not fulfilled in this case.

[0] https://www.icao.int/Meetings/AMC/MA/Eleventh%20Air%20Naviga... pp. A-24 and A-25.

[NovemberWhiskey]

From what I have read, the problem here was that there are two separate tower controllers for the north and south runways; there was a shift change and some kind of confusion over which of the runways was actually operational. The result was that the two tower controllers were not coordinating traffic at all.

EDIT: Kempegowda International Airport is the main airport serving Bangalore, by the way - I noticed the article assumed the reader knows that, and it's probably not general knowledge for the HN audience.