India has decided not to allow a United Nations (UN) investigator to help in the investigation of the Air India plane crash that killed 274 people in Ahmedabad on June 12. Two senior officials told Reuters that India had turned down the offer, despite the UN's aviation agency having offered to assist.

Usually, the International Civil Aviation Organisation (ICAO) sends investigators only when asked. But this time, ICAO took the unusual step of offering help without a request. They wanted their expert, who was already in India, to be allowed to observe the investigation. However, Indian authorities rejected the request.

This was first reported by the Times Now. The Aircraft Accident Investigation Bureau (AAIB) is leading the investigation into the crash, the deadliest in the world over the past decade. The AAIB has not responded to any questions yet. ICAO also has not commented.

India’s civil aviation ministry said on Thursday that they downloaded the black box data about two weeks after the crash. The black boxes were found on June 13 and June 16. Some safety experts are concerned about the lack of information from the investigation. They are also unsure whether the flight data is being read in India or the US. The US National Transportation Safety Board is also involved in the investigation.

So far, the Indian government has held only one press conference, and they didn’t allow any questions. According to international aviation rules (called "Annex 13"), black box data should be analyzed quickly, especially if it could help prevent future accidents. An unnamed aviation ministry official said India is following all ICAO rules and has kept the media informed. Most air crashes have more than one cause. A preliminary report on the crash is expected within 30 days.