Story highlights Officials: Doomed flight did not have a license to fly the Surabaya-to-Singapore route the day it crashed

Indonesian officials announce a full investigation, suspend AirAsia's service between the two cities

Indonesia's Ministry of Transport calls it a "serious violation"

Surabaya, Indonesia (CNN) AirAsia Indonesia did not have a license to fly the Surabaya-to-Singapore route on Sunday that ended in tragedy, it has been revealed.

The airline was approved to fly the route four days a week but it did not include Sunday.

Indonesia's Ministry of Transport has announced a full investigation and suspended Indonesia AirAsia flights between the two cities. It will also check all other airlines operating in the country to make sure they were complying with license agreements.

Indonesia AirAsia CEO Sunu Widyatmoko was quoted on local television as saying the airline would cooperate fully with the investigation and would not be releasing any statement until the results were known. He has not returned calls from CNN.

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