NEW DELHI — Both the black boxes of Air India flight 171, including the flight data recorder, or FDR, and the cockpit voice recorder, or CVR, have been found, P.K. Mishra, principal secretary to Indian Prime Minister Narendra Modi, stated in an official announcement late on Sunday.

According to the Hindustan Times early on Monday, the second black box found was the CVR, and the previous one was the FDR.

India's federal civil aviation minister, Ram Mohan Naidu Kinjarapu, has stated that the first black box was discovered on June 13, and the crash investigation report is expected to be released within three months.

According to The Hindu, downloading and analyzing the black boxes may take four to five days. Several international investigating agencies have reached Ahmedabad to assist India's Aircraft Accident Investigation Bureau with the inquiry into the crash that killed at least 270 people.

Also, on Sunday, authorities started handing over the remains of the victims of one of India's worst aviation disasters.

The London-bound Boeing 787 struck a medical college hostel in a residential area of the northwestern city of Ahmedabad minutes after takeoff on Thursday, killing 241 people on board and at least 29 on the ground. One passenger survived.

Hundreds of relatives of the crash victims provided DNA samples at the hospital. Most of the bodies were charred or mutilated, making them unrecognizable.

Rajneesh Patel, an official at the Civil Hospital in Ahmedabad, said authorities have so far identified 32 victims through DNA mapping and their families were informed. He said the remains of 14 victims were handed over to relatives.

The victims' families waited outside the hospital mortuary as authorities worked to complete formalities and transfer the bodies in coffins into ambulances. Most of them have expressed frustration at the slow pace of the identification process. Authorities say it normally takes up to 72 hours to complete DNA matching and they are expediting the process.

Among the passengers, 169 were Indian, 53 were British, seven were Portuguese and one was Canadian.

Qasim Rashid Ahmed, a British national of Indian origin whose charity provided food and accommodation to the victims' relatives, said most of the British victims had relatives in Gujarat state and had given their DNA samples.

Alongside the formal investigation, the Indian government has set up a high-level committee to examine the causes of the crash.

The committee will focus on formulating procedures to prevent and handle aircraft emergencies in the future, the Ministry of Civil Aviation said in a statement on Saturday.

Authorities have also begun inspecting Air India's entire fleet of Boeing 787 Dreamliners, the minister Ram Mohan Naidu Kinjarapu said on Saturday in New Delhi at his first news briefing since Thursday's crash.

Eight of the 34 Dreamliners in India have already undergone inspection, the minister said, adding that the remaining aircraft will be examined with "immediate urgency".

In another development, an Air India flight, operated by a Boeing 787-8 Dreamliner aircraft from Hong Kong to New Delhi, returned to its original destination after the pilot reported a technical issue on Monday, said media reports.

The flight AI315 remained airborne for nearly an hour before it safely landed at the Hong Kong International Airport.

"The flight has landed safely in Hong Kong, all passengers have disembarked and the aircraft is undergoing inspection," reported news agency Press Trust of India.