The possibility that the data storage unit of the cockpit voice recorder was damaged cannot be ruled out at present.
The plane crashed in the city of Wuzhou, the Guangxi Zhuang autonomous region of China, causing a forest fire, Sputnik reported citing China Central Television (CCTV).
There is no official announcement yet on the fate of the 123 passengers and nine crew members as hopes receded about finding any survivors, considering that the plane crashed and exploded in a mountainous area.
Three Indian carriers -- SpiceJet, Vistara and Air India Express -- have Boeing 737 aircraft in their fleets.
Aircraft debris and some personal belongings have been found at the air crash site in Tengxian County of Wuzhou City, but no survivors, state-run CGTN reported on Tuesday.
Two days on, distressing videos have emerged showing the Boeing 737-800 on a domestic flight nose-dived into the mountains on Monday crashing with an explosion leaving its debris in a vast forested area making rescue efforts difficult.
The incident happened on Thursday at 8.30 am, at Wangfu Town Central Primary School in Wuzhou city, Guangxi Zhuang Autonomous Region. The alleged attacker was a school security guard 50-year-old Li Xiaomin.
The 64 people missing after a massive landslide in northwest China's Shaanxi Province were presumed dead on Sunday, after rescuers failed to detect life at the site four days after they were buried under about 1 million cubic metres of mud.